I'm expecting this movie to be pretty long too. It took a while for the Ultron/Vision thing to unfold in the cartoons... I would guess maybe just as long if not longer in the comics.
They should've started it in the end of the last Iron Man movie... Which would give it more time to see Ultron go from this goody goody robot to the psycho robot
But I'm guessing they're going to do it like this article suggests
http://moviepilot.com/posts/2014/09...ron-2256443?lt_source=external,manual#!bSo0nu
So since they're going to start with the 2nd Ant-man, the original Hank Pym is going be
but somewhere back in the day he worked on Ultron with Tony and ofcourse, Tony tries to make him a weapon instead of the peaceful, polite robot Pym wanted.
So after Avengers, in pops the new Antman... But wtf @ Wasp and Yellow Jacket tho...
Oh well
And Cap breaks his shield, meaning the only place he can go and get it fixed is Wakanda