19. We Still Know Very Little About Certain Big Characters
We've gone 4/5 of the way through phase two so far - with the next movie to be released being Avengers: Age of Ultron next year - and yet we still know practically nothing about the Marvel Cinematic Universe versions of two of the main characters from phase one. Black Widow appeared in Captain America: The Winter Soldier, as Cap's sidekick of sorts, without going into her background again, while Hawkeye has yet to appear again at all since his one and only appearance in the Marvel Cinematic Universe to date in the first Avengers movie (we can't really count his Thor cameo) - and yet we're expected to root for these guys as much as we are for Iron Man, Hulk, Thor and Captain America in the biggest movie of the franchise to date next year. Ten films in - and one film away from a second Avengers movie - you really would expect to know more about two of the main Avengers.