Before Marvel unveiled their full Phase Three slate in October, Avengers: Age of Ultron was previously set to be the last Phase Two movie, with Ant-Man kicking off Phase Three a few months later. That all changed when the studio revealed Captain America: Civil War will kick off Phase Three.Ant-Man now serves as the final Phase Two adventure. During an interview with The Hollywood Reporter, producer Kevin Feige revealed that Ant-Man truly does close out Phase Two, and that it introduces the "quantum realm" into the MCU, and teasing that one of the Avengers may show up. The fact is, Ant-Man sets up Phase 3 in some very interesting and surprising ways.
"Ant-Man is the movie that closes out Phase Two. But the truth is, there's so much in Ant-Man that all plays into Phase ThreeIt really is the movie that closes out Phase Two. Phase One ended with Avengers. So some people thought that Phase Two would end with an Avengers film. But the truth is, there is so much in Ant-Man: introducing a new hero, introducing a very important part of technology in the Marvel universe, the Pym particles. Ant-Man getting on the Avengers' radar in this film and even - this is the weirdest part, you shouldn't really talk about it because it won't be apparent for years - but the whole notion of the quantum realm and the whole notion of going to places that are so out there, they are almost mind-bendingly hard to fathom. It all plays into Phase Three. It became very clear that Ant-Man is the pinnacle and finale of Phase Two and Captain America: Civil War is the start of Phase Three.
The producer added that Ant-Man is a perfect example of a film that both stands on its own, and is connected to the MCU as a whole.
"Ant-Man is one of the best examples of how a movie can do both. It's absolutely a stand-alone film about Hank Pym and Scott Lang, but it is within this universe."
Ant-Man centers on Paul Rudd's Scott Lang, a thief who is released from prison and is recruited by Hank Pym (Michael Douglas) to help him plan a massive heist. Paul Rudd teased that Lang has a run-in with one of Earth's Mightiest Heroes, during one of their heist's "test runs," although he wouldn't confirm which Avenger it is.
"Essentially, this is a heist film, and if you look at the structure of heist films, there is always a test run and the test run fails. In talking about what could be a good test run, we were just playing around with conversations and thought, 'Oh my God, what if he actually fought an Avenger?' We started getting really giddy about this idea. It seemed like that would be a fun way to incorporate the universe into this film."