Originally Posted by an_ewok
Because as far as we know, Hank Pym won't be the main character of Wright's Ant-Man, Scott Lang will be.
This doesn't make much sense from a business or artistic standpoint.
You're taking a major character who is the creator of Ultron and Ant Man and you're dividing him into a weaker character and merging him with an already popular character.
Why not make Ant Man a major player in Marvel Universe for the sake of the franchise and fan-service?