Just thought I'd pre-emptively get this question on here :) (Note: possible spoilers ahead)
OK so I went into a cave on the cliffs just below the Sangi Ranch. Professor Juniper was there. Mesprit, Azelf and Uxie appeared then left the cave. Juniper said a bunch of stuff (since this is the Japanese version I didn't understand it of course).
Where did they go? Are they roaming Unova now? (God I hope not)