Re: Avengers 2: Age of Ultron
So sick of people pissing on this before we even know any of the details. Also we don't even know if Stark is the creator, that's speculation at this point, even thought it might make the most sense, and it's been done before as in Next Avengers.
Marvel has a plan, and it's worked out pretty well so far. The plan is not to introduce characters in Avengers that haven't already been introduced in individual films. Some of the minor characters are exceptions like Maria Hill, who was a new character and Barton/Fury who were introduced as cameo appearances.
“Whenever you see somebody crossing over to something it gives it pop. Like Murder She Wrote and Magnum [P.I.] — great crossover. I got excited.” Joss Whedon on Spider-man joining the Avengers.