Well since it looks like Miz is getting a face push, I'd love to see Orton turn back heel, since he's a better heel and start a program with the Miz.
I'd keep Orton out of the title picture until after wrestlemania and just give us a good old fashion feud. I think a feud with the Miz could elevate the Miz while not diminishing Orton, kind of like when Edge was feuding with Angle. That put Edge over.
But I also feel that the WWE has too many potential main event heels right now, so if they turn Orton I would like about 2 to 3 heels to turn face to work out the heel to face ratio. So, Miz, Ziggler and maybe Cody.