Originally Posted by ThePowerCosmic
Why does it need to be one or the other? Stark and Pym can be collaborating on the creation of Ultron. I want Pym to create the majority, though. It won't be some random character if he's introduced in AOU(possibly even an earlier film like Cap 2) before Ant-Man. We've already dealt with Stark in a dark place, so give another hero a chance to do it. And no one is more fitting in this type of situation than Pym, imo. Getting the audience to care about new characters is something that Marvel embraces.
Plus, Joss isn't going to sabotage Avengers canon *and* Edgar Wright's film in the same fell swoop. Taking Pym out of the Ultron equation makes Ant-Man (the movie and the character) utterly redundant. Nice move, Joss.
And you'd have a hard time selling to audiences a decent reason for their favorite superhero to suddenly create the most lethal supervillain they have yet to encounter. Nothing is to be gained by making Stark look like an idiot for *accidentally* making a robot that proceeds to destroy most of humanity. But making some heel like *Hank Pym* responsible for that kind of spectacular ****-up....? But of course.