Back in December of last year it was learned that Joss Whedon had cut The Wasp from The Avengers movie.
Whedon said The Wasp didn't work for the script as he was getting carried away writing too much of her.
Now we see that The Wasp wasn't just a few words in a script, but went so far as to make it to pre-production in the form of animated storyboards.
Federico D’Alessandro, the storyboard artist that released the alternate Iron Man 3 Ben Kingsley Mandarin animatics, has released one from The Avengers movie which features The Wasp.
Check out the video below where we see The Wasp is actually part of the final battle.
Regarding The Wasp in The Avengers 2 or the Ant-Man movie, there hasn't been much talk, but Janet definitely can't be ruled out just yet.