Truthfully I actually was awaiting this to occur during this match, and was rather disappointed with what was shown instead. His potentially continued existence still gives me hope that he will use the Fushi Tensei at some point or another. On Sasuke or not I believe it will be interesting if it does infact happen (more so on a character with some significance).
I would love to see him take Sasuke's body. And at this point I don't see what's stopping him... Sasuke is still up against the wall paralized from fear, shaking, sweating and probably has shit in his pants. Oro is obviously not dead, Itachi's most awesome/powerfull jutsu couldn't even take him down. He has the perfect oportunity at this very moment to achive his goal.
But I don't blame him if he doesn't take Sasuke's body.. Imagine, after all these years he finally obtains his perfect body, his arch nemesis is laying on the groud passed out from fatigue. And the first thing he has to experience in his new body, is having shit and piss running down his leg!! No matter what Oro always gets the "shitty" end of the deal