Just days after the release of Ant-Man, Marvel Studios' President Kevin Feige is talking about the potential new costumed superhero teased in the mid-credits scene at the end: Hope Van Dyne (Evangeline Lilly) as the Wasp. Feige has already gone on record stating that the Wasp would show up in a future movie, but now the long-time Marvel executive reveals that she was almost in Marvel's next film but got nixed.
“She was included in early versions of [Captain America: Civil War] but there are so many characters in Civil War that we didn’t want to do her a disservice, like she flies in, ‘I’ve got the costume now’, and she flies out," Feige told SlashFilm. "With Ant-Man, and I’m not saying thats what Ant-Man does in the movie, but we already know him, we’ve already seen him. We haven’t seen her as Wasp and we don’t want to rob the opportunity of seeing her in the outfit for at least almost the first time, and seeing her dynamic with Scott in a way it could play out, so we’re saving it. But its going to be in Phase three for sure.”
Wasp was also in the early plans for Avengers: Age of Ultron but was removed, but given Feige's comments here it looks like there is a place for Hope Van Dyne as Wasp -- as well as more of Scott Lang's Ant-Man beyond his appearance in 2016's Captain America: Civil War.
Marvel has Phase 3 planned out through May 3, 2019's The Avengers: Infinity War - Part II, so if Feige's statements prove true there's several movies, or even television series, where the Wasp could land next.