I wish they didn't keep going for "the universe is ending" levels of drama. It's too big and clearly going to get undone: wasn't that long ago the Universe was destroyed when the TARDIS blew up and Amy magically brought the Doctor back! Or when the Daleks are gone forever, except for a few spares...

I've got a couple of guesses for the wrap up of the story - one the seems more likely so I wont say it in case it is spoilers and one very, very unlikely: the Human Doctor and Rose turn up to help from that alternate universe that Division is trying to cross over in to (turns out it's that Age of Steel universe). Of course maybe there's also Daleks in that void between the universes?