Something I have been kind of concerned about is Sasuke actually coming back to Konoha and with the combination between him and Naruto making the village
crazy over powered. However, I began to notice something. Kishimoto is systematically shutting down almost all of the top shinobi of the current generation in order to make room for the next generation. Think about it almost all of the star shinobi are down.
Danzo-dead
Jiraiya-dead
Asuma-dead
Kurenai- playing mommy
Shikaku-dead
Ino's dad-dead
Yamato-dead
Guy- crippled
Shino's Brother Torune-dead
Fuu-dead
Sharingan Kakashi- (no sharingan)
The only reason Tsunade is probably still alive is to pass the title of Hokage on to Naruto. Once the war is over Tsunade will probably have used her Milotic Regeneration so much that her age begins to take a toll and she is forced to retire.