My prediction:
Kakashi and Naruto defeat Obito together. After Obito is defeated, Kakashi explains what really happened to Rin (I'm sure he had some really good reason for killing her), and then Naruto uses Jesus-no-jutsu to convert Obito.
By this time, Obito is mortally wounded though, so he uses the last of his strength to Rinne Tensei Madara (bringing him back to life) so that he can be killed. Obito dies, Madara is revived (becoming the 10 tails host) and now it's Madara vs. everybody.
I would also guess that Sakura is reviving the Kages, and they'll be back near the end to help beat Madara (since Onoki swore he would stop him).
No idea who Oro and Sasuke are going to see.
Kakashi and Naruto defeat Obito together. After Obito is defeated, Kakashi explains what really happened to Rin (I'm sure he had some really good reason for killing her), and then Naruto uses Jesus-no-jutsu to convert Obito.
By this time, Obito is mortally wounded though, so he uses the last of his strength to Rinne Tensei Madara (bringing him back to life) so that he can be killed. Obito dies, Madara is revived (becoming the 10 tails host) and now it's Madara vs. everybody.
I would also guess that Sakura is reviving the Kages, and they'll be back near the end to help beat Madara (since Onoki swore he would stop him).
No idea who Oro and Sasuke are going to see.