(SPOILER)Emma was one of the mutants killed by Trask. I believe when Mystique looks through the file, Emma's one of them.
Marvel & Fox had to make a special deal for both to use Quicksilver in their respective movies. I don't think Wanda was part of that deal, & Marvel is using her character in Avengers 2. (SPOILER)However, there was the scene of Quicksilver in his home w/ a little girl, who it can be argued is Scarlet Witch. (I know, the characters are supposed to be twins, but you know how it works w/ these movies). But then, the little girl could be Polaris or just some human sister.
I would like more Bishop, too. I'm not sure who's going to be in the next one. Supposedly it's based in the 80s, so we'll probably get JLaw, Fassbender & McAvoy in it.