Studio head Kevin Feige has announced the long-rumoured film based around the Marvel Universe's Sorcerer Supreme.
"Ant-Man is definitely part of Phase Three," he told MTV News. "Like Iron Man 3, it's certainly set in the Marvel Universe, but it's also through the lens of Edgar Wright - which is the only reason we're making the movie.
"I've known Edgar since our first lunch together at Comic-Con in 2004. He asked me what Marvel was doing with Ant-Man - we weren't even a studio then. What a difference eight years makes!
"It's very much an Ant-Man origin movie from the perspective of Edgar Wright and his co-writer Joe Cornish. It will of course be firmly planted in the MCU, but a different corner than we've seen before."
Feige continued: "Beyond that, Ant-Man is the only one officially announced, but you probably don't have to look too far to guess at the next list of characters we're toying with and beginning to develop.
"Doctor Strange, which I've been talking about for years, is definitely one of them. He's a great, original character, and he checks the box off this criteria that I have: he's totally different from anything else we have, just like Guardians of the Galaxy.
"He's totally different from anything we've done before, as is Ant-Man, which keeps us excited."
Marvel is currently embarking on its Phase Two films following the conclusion of Phase One with 2012's Avengers.
The second phase will feature Iron Man 3, Thor: The Dark World, Captain America: The Winter Soldier, Guardians of the Galaxy and Avengers 2.
Doctor Strange has been rumoured for a cameo in the second Thor film.