Quicksilver's MCU death saved Scarlet Witch from becoming a far more powerful villain than she wound up being on-screen, as it prevented her from tapping into dark abilities that would have changed the trajectory of Marvel's entire Multiverse. Scarlet Witch's connection to the multiverse as an Ultimate Nexus amplified when in the presence of her twin brother Pietro would have been too dangerous for the MCU version of the character to wield. Quicksilver's sacrifice in Age of Ultron was necessary to prevent a more nightmarish scenario than viewers witnessed in Doctor Stranger and the Multiverse of Madness.

Warning: Spoilers Ahead for Scarlet Witch #2!Quicksilver undeniably had the most disappointing death scene in the MCU, but it was absolutely necessary to protect the multiverse. While at the time, it was considered a disappointing way to establish his character on screen, a new reveal regarding the twins' connection shows that his death was for the best.