I'm just kinda afraid to see it happening. I've said before that if Emma was scheming to seek revenge for Scott she should have just pretended to forgive him… but if she really is the mole, the reason why she does it is needed. Perhaps it's because she always prefers teaching to training but finds the new Xavier school is actually the military headquarters of the revolution instead of a real school; but it's not impossible too that she suddenly believes that joining the X-Men was a mistake. After all she's in black now and it reflects how she sees herself as. Emma seems to be very rational about what happened to her during AvX but it might be paving the way for her next move.
Hoping she's not the mole! Her being a teacher again is what I love to read. And it's not a good idea that kicking Emma, one of the core characters of UXM, out of the team only after one arc. As for AoU, promos and interviews about it will probably be coming soon. Perhaps she will only play a minor role in it but since the writer is Bendis, I guess what's going to happen to her in this event will affect Emma in UXM too.