Doesn't vanitas's outfit look similar to the one riku wears in KH1 when hes taken over by darkness?

There was already a discussion on this. Don't know how far back, but i know it was talked about before

oh ok thx for that

Yea I saw that resemblence too. If you also watch I think the bbs intro, you'll see that vanitas does that thing with his hand pointing at ven, like riku does with sora, near the beginning of kh1

Not to mention that their battle stances are similar.

they have a connection which is soon to be revealed

They kinda have the same keyblade too.