All of the footage used in trailers and TV spots are reportedly from the first 15-20 minutes of the film, according to producer Kevin Feige. With two trailers, several short TV spots, a "special look" ticket sales announcement, and a 181 minute runtime, we have seen up to 4% of the final film so far.

This film and its predecessor Avengers: Infinity War (2018) were filmed entirely on digital IMAX cameras, making them the first Hollywood films shot entirely on IMAX cameras in an exclusive open-matte aspect ratio of 1.9:1.

Kevin Feige has said that the series finale episode of Star Trek: The Next Generation (1987) inspired this film.

Filming officially began on August 10, 2017. It was shot after around a 3-5 week break once Avengers: Infinity War (2018) wrapped, which started filming on January 23, 2017.

Since his introduction in the Marvel Cinematic universe, Chris Evans has appeared as Steve Rogers/Captain America in one film a year except for 2015 where he appears twice, totaling ten times. He has starred in Captain America: The First Avenger (2011), The Avengers (2012), an uncredited cameo in Thor: The Dark World (2013), Captain America: The Winter Soldier (2014), Avengers: Age of Ultron (2015), an uncredited cameo in Ant-Man (2015), Captain America: Civil War (2016), a special cameo in Spider-Man: Homecoming (2017), Avengers: Infinity War (2018), an uncredited cameo in Captain Marvel (2019) and Avengers: Endgame (2019). In October 2018, Evans officially announced via Twitter that he expressed great satisfaction in being involved in the franchise for almost a decade.

Not only did Avengers: Endgame become the biggest pre-sale title ever in the first 24 hours, but it accomplished this feat in only six hours

Even though Captain Marvel (2019) came out one month before this film, Brie Larson shot her scenes for this movie first.

With this film along with Captain America: Civil War, Spider-Man Homecoming and Avengers Infinity War, Tom Holland breaks Tobey Maguire's record for playing Spider-Man in live action movies the most times.

The film will conclude the recurring Thanos and Infinity Stones story arc in the Marvel Cinematic Universe.

This will be the 22nd film to be released by Marvel Studios for the Marvel Cinematic Universe.

The first trailer was posted by Marvel Entertainment simply as "Marvel Studios' Avengers - Official Trailer", without the film's title in the name of the video, in order to surprise the fans with the title's reveal at the end of the trailer.

Evangeline Lilly had said this film heavily reminded her of her career playing Kate Austen in LOST (2004), especially the show's fourth season which employs "flashforwards" as a central plot device.

Chapter Ten of Phase Three in the Marvel Cinematic Universe.

In September 2018, the Russo Brothers posted a picture on social media of the film's set, with the caption "Look Hard". This lead many to speculate and believe the title of this film was hidden somewhere inside the photo.

The North American release date was moved up a week earlier from May 3rd to April 26th, 2019, after the first trailer and title released on December 7th, 2018. There was much speculation that Marvel Studios would do this, as they moved "Infinity War's" release up a week as well, in order to reduce the possibility of major plot leaks from countries that released the film earlier.

Robert Downey Jr. is the only who read the entire film's script.

This marks composer Alan Silvestri's fourth time composing a film in the Marvel Cinematic Universe, with his first three being Captain America: The First Avenger (2011), The Avengers (2012) and Avengers: Infinity War (2018).

Formerly known as "Avengers: Infinity War, Part II"

As they did with the previous film, the Russo Brothers wrote a letter to fans, asking them not to spoil anything about the movie, as part of a viral campaign on the internet. The hashtags were #DontSpoilTheEndgame and #ThanosDemandsYourSilence.

This is the fourth Marvel film directed by Anthony and Joe Russo.

During an event of Guardians of the Galaxy Vol. 2 (2017) in April 2017, Zoe Saldana revealed the title of the film as Avengers: Infinity Gauntlet. Following this, James Gunn announced that was not the title.

On September 11, 2017, the production of the movie was temporarily shut down because of Hurricane Irma.

Despite speculation and rumors, the Netflix Marvel characters like Daredevil, Jessica Jones, Luke Cage, Iron Fist, Elektra, and The Punisher will not make an appearance in this film.

Opening night tickets were resold on eBay for thousands of dollars, with a pair of IMAX tickets in New Jersey selling for $15,000.

When the Russo Brothers tweeted out a photo of the re shoot cast. Yvette Nicole Brown from Community was in that photo. Making her the third cast member from Community to appear in a Russo Bros. MCU film.

Just like Infinity War, this film's release was pushed one week earlier, placing it on April 26th, 2019.

Brie Larson (Captain Marvel) and Chris Evans (Captain America/Steve Rogers) have previously starred in Scott Pilgrim vs. the World (2010) together before either of their appearances in the Marvel Cinematic Universe. Larson played the rock star Envy Adams (Scott's (Michael Cera) ex-girlfriend), and Evans played the action movie star Lucas Lee (one of Ramona's (Mary Elizabeth Winstead) Seven Evil Exes). In addition, that movie was directed and co-written by Edgar Wright, who wrote the original screenplay for Ant-Man (2015) (a character who also appears in this movie) but dropped out as director for that movie due to his creative clashes with Marvel Studios.

The first poster released featured Okoye but did not include Danai Gurira's name among the rest of the cast members' names at the top of the poster. That poster was quickly recalled and replaced with one that did include her name.

Title was announced with the first trailer that was released on December 7th, 2018.

Release Date Change: The original release date was May 3, 2019. However, following the success of the opening of Avengers: Infinity War in the last full week of April, Marvel opted to replicate that move here.

First MCU film to feature both the Hulk and Ant-Man. Paul Rudd previously appeared in I Love You, Man (2009), which also featured the original Hulk, Lou Ferrigno. Ant-Man (2015) also featured a cameo by Garrett Morris, who played Ant-Man on a Saturday Night Live (1975) sketch that also featured John Belushi as the Hulk.

This film title was shown as 'Marvel Studios' Avengers: Untitled' at D23 2017.

It is the 3rd Avengers movie to be released in the same year as a Quentin Tarantino movie. The Avengers and Django Unchained were both released in 2012, Avengers: Age of Ultron and The Hateful Eight were both released in 2015 and Avengers: Endgame and Once Upon a Time in Hollywood are both being released in 2019.

It is the first Avengers film in the MCU not to release in the same year as a film in Sony Animation's Hotel Transylvania franchise. The Avengers (2012) released in the same year as Hotel Transylvania (2012). Avengers: Age of Ultron (2015) released in the same year as Hotel Transylvania 2 (2015). And Avengers: Infinity War (2018) released in the same year as Hotel Transylvania 3: Summer Vacation (2018).

Taika Waititi also appeared in another movie based on Marvel Comic: The Wolverine (2013)/

The film was shown in theaters with a Family Guy (1999) episode entitled Lottery Fever.

Evangeline Lilly and Paul Rudd were filming Ant-Man and the Wasp (2018) and this film at the same time.

Endgame was Robert Downey Jr.'s last contractual obligation to play Tony Stark/Iron Man for Marvel Studios. Downey has stated he plans on being involved with the Marvel Cinematic Universe longer than his current contractual commitments are structured, so many are led to believe he will sign a new deal after his current one has concluded.

Set photos leaked showing Robert Downey Jr., Chris Evans, Chris Hemsworth and Tom Hiddleston wearing outfits and costumes from the first Avengers film, as well as the rubble-filled New York set during which the final battle of The Avengers (2012) is set. This leads many to believe that either a flashback sequence or time travel will play a major role in this film. The fact that Ant-Man is seen among these characters creates the speculation that he will be the one to travel back in time by means of the Quantum Realm; this theory seems all the more likely after the mid-credits scene of Ant-Man and the Wasp (2018) where he becomes trapped in the Quantum Realm after receiving the warning to avoid the time vortex.

Clint Barton appears in Japan with the identity of Ronin in this film. This is based on the comics, where in the aftermath of the Civil War event he took up the Ronin identity during a mission to Japan. Barton has a tattoo of a ronin on his arm, as a further homage.

Aaron Taylor-Johnson's character, Quicksilver, was seen on set pics of this film. Hinting that he might return or will just briefly make an appearance in a flashback scene of Avengers: Age of Ultron (2015).

Toward the end of the second official trailer, the Avengers are all wearing identical white suits as they stride off to supposedly save the day. These suits bear somewhat a resemblance to the Quantum suit worn by Hank Pym in Ant-Man and the Wasp (2018), which further adds on to the theory that the Avengers will use the Quantum Realm to reverse Thanos' actions in the previous movie. Tom Holland had already spoiled by accident in an interview that the Quantum Realm will play a major role in this movie.

Rumored to be titled Avengers: End Game, after a comment made by Doctor Strange in Avengers: Infinity War (2018). This was also more believed after a fan looked at one of the cinematographers' credits, where it listed the title Avengers: End Game in the films he has/or will do. This was later confirmed to be the case.

Gwyneth Paltrow is rumored to suit up in her own Iron Man suit, with the name Rescue.

The downer ending to Avengers: Infinity War was going to be this film's beginning; had that been the case, Infinity War would have ended with Thanos completing the Infinity Gauntlet before actually using it in this movie. However, the creative teams working on the two films decided that it best suited the story to have the actual cliffhanger follow the fingersnap itself and to show its fallout before, making viewers wait a year to see how the story would be resolved.

This movie's storyline is the ultimate payoff to Tony Stark's statement in The Avengers (2012) where he tells Loki "If we can't protect the Earth then you can be damn well sure we'll avenge it". In Avengers: Infinity War (2018), they failed to save the universe, which is why they'll be avenging it in this movie.

For the first time in marvel movies there is no mid or post credit scene.

It is rumored that Bruce Banner and the Hulk will merge into one identity that dubs itself the Professor. This is based on the Merged Hulk (Banner and Hulk merged into one body), and is named after the Maestro (another merged form - "maestro" is Italian for "Professor"; however the Maestro was a villain in the comics, while the Professor is still heroic).

The film features Drax, both Wasps, Hank Pym, Spider-Man and others who were dusted in the snap.

Despite rampant rumors that it may happen due to Fox being acquired by Disney, no non-MCU characters appear in the film (X-Men, Deadpool, Fantastic Four, etc.) There is also no indication as to how these characters may be incorporated in the future.

Akihiko, the Japanese gangster killed by Clint Barton (played by Jeremy Renner, is played by Hiroyuki Sanada, who also played Shingen Yashida in The Wolverine (2013).