How can we know ? We aren't Game Freak.
But it is very probable that Gamefreak plans a Pokedex for X & Y, I would rather say, a DLC for Pokedex 3D Pro enlarging it and containing the Pokemon. But of course, the release of this new DLC or Pokedex must reveal a big spoil, leading every site to spam post informations.
I think they will wait a little bit.