Just like many other Kage's ( Tsuchikage ), Raikage didn't had any hope left in believing that forgiving someone for his deeds, will solve all the hatred/darkness/revenge.
RIGHT NOW, it's time for Naruto, for convincing Raikage, that there's IS a way.. that way is Naruto Uzumaki. And the beauty about this scenario is that; KILLER BEE is going to be the ONE, who's gonna block Raikage's attack for capturing/holding Naruto from going away. Killer Bee is willing to give his life for Naruto, just to save the world.
- This way, Tsunade will be fighting Dan and Raikage/Killer Bee together; will be fighting their father.
I like how Sakura evolved herself in becoming one of the best medical ninja around. She IS the next gen of Tsunade,.. BUT after re-reading the chapter, I still think it was a " cheap " way for discovering the spy. Fckin TonTon !!
Btw, Naruto vs. Raikage,.. means also that we're gonna witness how fast Naruto really IS in his R- Mode. It was said that Raikage's second form of speed was as fast as Minato's yellow flash, meaning; it won't be only raw power, it will also be a match between speed.