Even right before Remnder's first issue of Uncanny was released, Remender stated that he saw Betsy as an omega level telepath, now that the amazing Dark Angel Saga has ended, Remnder dishes a bit more info on the state of Betsy's psychic abilities...
The Jean Grey of the "Age of Apocalypse" reality opened Betsy's mind up (See Uncanny X-Force #17). She unlocked a lot of stuff. In this issue, you saw the giant, Phoenix-like butterfly effect Betsy generated when she was fighting Archangel. She knocked him down with that. No one had accomplished that to this point -- she hadn't been able to get into his mind before that either. He had just been this thing that was way, way beyond her. Whatever Jean Grey did when she was inside Betsy's head unlocked some potential.
We're going to be seeing a lot of that. She is an Omega level. One thing we wanted to accomplish with this story was that Betsy comes out a full fledged Omega level mutant, on par with Xavier or Jean. In my mind, that's what was accomplished when Jean unlocked the powers in her head.
He also teases what's in store for Betsy:
Now, we're dealing with Betsy's fall out from all of this. I don't think anybody is going to anticipate Betsy's arc for next year, so the Otherworld arc is really about Betsy's reaction to what happened, Fantomex and the consequences for what he's been up to, as well as the rest of the Braddock clan being hip to the fact that this guy is someone to be wary of.
ALL HAIL REMENDER