If phase 3 is five movies, like phases 1 & 2, I'm not even sure we're getting any more new characters in addition to the ones we already know about
2. (probably) Doctor Strange
5. The Avengers 3
Chances are, unless one of those movies underperforms, they're going to want to make sequels to Thor 2 and Captain America 2, maybe even Guardians of the Galaxy. So unless they are doing more than five phase 3 movies or at least two of the upcoming phase 2 movies don't do well enough to warrant a sequel, we might not get a chance to see Captain Marvel, Black Panther, etc. until phase 4, unless they appear in some other character's movie first.