I was just saying that it was interesting ;A;
And I said that this was very likely exactly Xemnas' agenda.
Beside that though, I think Ven has been through enough bad stuff already by having his heart shattered twice, used to forge a weapon and almost be enslaved by a crazy maniac who was created from his own darkness.
As for why Saix wanted to find the chamber ("for our own reasons", as he said to Axel in Days) I dunno. What would Saix and Axel do with a comatose body? *scratches head*