Remember Kishi said in an interview:
Kakashis story is like the colour
DARKBLUE
Now we can speculate whats the meaning of Dark:
See this:
Kakashi will lose his eyesight cause of a space time ninjutsu that allows naruto to be in time (else he would have been to late)
And the meaning of Blue:
Its quiet, makes people being harmonic etc...
I think we cant forsee the battles but i hope it will be like THIS:
The old ninja squads out of narutos childhood will be formed again:
Shikamaru, Choji, Ino
Naruto, Sakura, Sasuke
Tenten, Rock-Lee, Neji
Hinata, Shino, Akamaru&Kiba
Gaara, Kankuro, Temari
....
Then all of them will fight gainst one being of pain but naruto meanwhile comes up with a brilliant plan to kill the real Pain and we see the true form of pain fighting naruto in the valley of end winning by naruto
