New Kingdom Hearts game.

 Spoiler

It looks like its going on inside Soras heart.
Ven= shares his heart with sora
dark half of vens heart = Vanitas
Vanitas takes Soras appearence because of the piece that took his place which is soras heart.
Roxas looks like Ven because of sora's heart and vens being connected.
Roxas has vens heart(i think).
Now that Roxas and Vanitas which arent the whole are back in sora's heart they fused or something and Xion is in the back doing something.

I wouldnt be amazed if next game is inside soras heart or that we play inside soras heart for a while