And.. Thats what the place in the final DLC for new vegas was called; The [great] Divide.
Bethesda have been known to hint at DLC previously in-game so i thought i'd point this out

May be just a reference.
God I hope we don't end up back in Vegas. Talk about a wasteland.
I doubt it. The Great Division is what the Atom followers use to refer to nuclear explosions. I'd chalk it up to little more than religious bunk than anything worth conspiracy theory over.
Yup, pretty sure they're referring to the splitting of the atom.