According to Variety Marvel is in early talks with Evangeline Lilly (Lost, Desolation of Smaug) for the female lead in the upcoming Edgar Wright/ Marvel film. Variety did not reveal exactly what her part would be but are suggesting that Wright could make her Hank Pym's daughter.
They've already announced Paul Rudd as Scott Lang and Micheal Douglas as Hank Pym so if Evangeline Lilly joins the cast who will she be? Is Janet Van Dyne going to be in this movie? Will she be someone different? Will Hank Pym's daughter end up being a super hero too? Is Scott Lang going to steal the suit and Hank Pym's daughters heart? The Marvel movie universe is different. Your guess is as good as mine but you can see the article here and speculate below. Guess we'll have to wait and see though.