Re: Avengers Sequel ideas?
Whirlwind would be good as a main villian. Pym doesn't have to be a 2 and a half hour epic. I mean, it is Hank Pym, as much as I like the character. Although the general fan might not know Ultron, you could have him partially or already completed while letting him commit subtle actions during the film on his way to becoming the Ultron who wants to destroy humanity. Then, as marcvader said, since pym and vandyne can't defeat ultron alone, it gives them a reason to go to the avengers for help thus becoming members in the next film