
Ant-Man brings the lives of scientist Hank Pym (Douglas) , his daughter Hope (Lilly) and Scott Lang (Rudd) on a mission to stop Pym's former protege Darren Cross in creating a dangerous power suit. Hank Pym has actually made an earlier suit and has chosen Scott as he has skill and intelligence that he admired.
In the comics, Ant-Man is known to be one of the original founders of the Avengers which merits his place in the elite superhero team. For this movie, his involvement with the team will be revealed and a possible encounter with them. And like all Marvel movies, stay until all end credits and a there will be that clincher scene waiting for you.