I don't understand why some people don't want her back. It's make more sense if she came back, cause comics will get a whole lot better with her in them. Just look at X-Men history, some of the best stories ever told, feature her.
Age of Apocalypse, Dark Phoenix Saga, Fatal Attractions, Here Comes Tomorrow, Legion Quest, The Prime of Miss Emma Frost & Murder at the Mansion, Onslaught, Phoenix: Endsong, Phoenix: Warsong, Planet X, Ultimatum, X-Cutioner's Song & X-Tinction Agenda, Mutant Genesis etc. Some of them I just like and some of them I loved. In most of them, she had a part to play.. Stories are a lot better with her, then without her.
Over last couples of years, what stories and titles have been that good
Craig Kylie & Christopher Yost work on the X-Force
Joss Whedon run
That's really it.
Uncanny X-Force, X-Men legacy and X-Factor are ok titles, they have a few good stories and they also have a lot of rubbish to. Regenesis only started at end of 2011, you can't really judge on how good it's going be, cause, it just started.
To me it just make more sense to bring her back, the X-Men will probley go back to being like family again. Beast might make up with Cyclops and Charles will probable return.
On top of that, there will be more rivalry in X-Men, paricular between Emma & Jean and maybe even Scott and Logan. I have just read Generation Hope 15, Hope implied that Emma is a slut and Emma slap her. No one want's that type rivalry again. Really? With Jean it will be a whole a lot better.
Just makes more sense to bring her back. More drama, better stories will be told.