Baki's still around. Gaara will always be able to turn into shukaku.

The last statement about Oro teaching Sasuke; why would he teach Sasuke anything? It's not like Sasuke needs to learn the jutsu in order for Oro to perform it once he changes bodies.

So, if all Oro wants is Sasuke's body, then why teach Sasuke anything at all e.g. summoning manda? There would be no point.