Now that Paul Rudd is set to play Scott Lang, and Michael Douglas is playing Hank Pym in Edgar Wright's Ant-Man, Marvel is looking to cast some supporting roles. According to The Wrap, Michael Peña (End of Watch) has been offered a part in the film.
There's no word on who Peña would play in the film, but I imagine it could either be a friend of Scott Lang, or maybe a villain type character. Whatever he ends up doing in the film (if he's cast), I'm sure he's going to be great. The guy is a solid actor.
I'm curious to hear and see more about what this movie is actually going to be like. It's shaping up to have an incredible cast, though!