PG-13 | | Action, Adventure, Sci-Fi
When Dr. Jane Foster gets cursed with a powerful entity known as the Aether, Thor is heralded of the cosmic event known as the Convergence and the genocidal Dark Elves.
Loki's trial had been seen in the "movie prequel comic" book which serves as a "bridge" between Thor (2011), The Avengers (2012), and this movie. The filmmakers liked it so much they incorporated it into the film.
Long before the birth of light, there was darkness... and from that darkness came the Dark Elves. Millennia ago, the most ruthless of their kind, Malekith, sought to transform our universe back into one of eternal night. Such evil was possible ...
In their escape, Thor didn't tell Loki that they were going to abandon the big ship and jump to a smaller ship. This small ship barely fit into Loki's secret pathway. If Loki thought they were going to continue on in the big ship, he would have known that there was no way they could escape through the secret pathway and never would have gone on with the plan.
There's a statement at the end of the credits: "Thor will return." His next appearance in the MCU is in Avengers: Age of Ultron (2015).
£8,668,172 (UK) (3 November 2013)