They better not bring back pal park, that was a pain in the ass with it's one transfer a day limit and having to run around. Gen IV to V transfer was actually kinda fun with that mini game and no daily limits.
Though there is a chance they might not have migration at all, and if that's the case I hope everything can be caught between X and Y.
They better have migration of some kind. I want to send over a Zorua to have as my second pokemon so i have my starter and Zorua in case Fennekin turns into something ugly down the line or just ends up being weak.