I've believed that's plausible for a long time, Kishimoto doesn't let too many depressing things happen (Nagato reviving everyone etc) and I strongly believe he's leading eveyone on with these OVA's and whatever.
If Sasuke rebuilds himself after whoever he goes to see, I think he'll completely oppose what Obito and Madara are doing.
first they fight , then one acknowledges others powers ( Sasuke acknowledging Naruto's powers in this scenario) and then they team up for whatever purpose there will be left.
otherwise they will fight , one of them dies or both die ..
I've always believed Naruto and Sasuke will team up. Those two hold the power of the Rikudou Sennin since Naruto is the sage's body and Sasuke is the sage's eyes.