10. When Will Quicksilver & Scarlet Witch Join The Avengers?
It's clear from the movie's trailers that Quicksilver (Aaron Taylor-Johnson) and Scarlet Witch (Elizabeth Olsen) get up to some mischief before joining The Avengers: Quicksilver can be seen punching Captain America (Chris Evans), while Scarlet Witch works her suggestive magic on both Black Widow (Scarlett Johansson) and Hulk (Mark Ruffalo). They will eventually join the team to help take down Ultron, though it remains up in the air at which point in the movie this will take place. The Likely Answer: It won't be too early on, that's for sure, because Ultron first has to be introduced, at which point the siblings are still part of the dark side. They'll likely flirt with switching sides mid-way and then truly join The Avengers for the climactic final battle, where Hawkeye (Jeremy Renner) tells them that if they go out and fight, then they're Avengers too.