Tsunade surviving probably opened up some doors.
First off, I think the Naruto series may drag on due to Tsunade not dying. Naruto is suppose to end when he is Hokage, and that probably won't happen until she is dead.
Second, Orochimaru only wanted to heal Tsunade and the Kages to help with the battle against Madara. Kind of selfish don't you think. Orochimaru knows damn well she can't do anything while The Madara, and the juubi are the main antagonist. Also he has his arms back, and is using Haishi's cells, making him stronger than ever. That's what I think.
But maybe Sasuke really did change Orochimaru, I think that's dumb being, THATS OROCHIMARU, but its kishi's choice not ours.
Kabuto, is said to have surpassed Orochimaru, and he is not dead. Maybe he may have a place later. A lot of people the storyline has talked about has not been edo'd YET(That's what I think)
Like Shisui, Kagami, maybe Jiraya, and Kushina.
Minato, and Naruto is there why can't Kushina be
Orochimaru, and Tsunade is there, why not J-man.
This is why I think the series could drag on, or be a part 3.
What do you guys think?