where's is this kishi interview you guys keep on talking about? (link plz) also i think we gonna see some of the 4th's jutsu in the battle agains naruto vs. pein...then someone will shout "Konoha's Yellow Flash is back" then naruto will look at them and they will be....it's..that...it's that naruto!!!!!!!?!?!" Kakashi will make his impressed face

then naruto will do somthing dumb and they will be "yeah it's naruto" hahaha!...ok but really now i do believe that naruto will bust up some of the 4ths techniques (besides rasengan)
Kisame, there is something fishy about him (no pun intended) for what i can tell he was a really good friend of Itachi, I mean for Itachi to let him see him cry must of been good pal don't you think...i think he will be the one betraying akatski, i think he still is in akatski to have a watch over sasuke.
As for who has to die in Peins attack...kakashi won't die, but i'm thinking he will lose his sharingan, Tsunade is still a high possibility (if she dies and Kakashi loses sharingan i think he will then be Hokage) ...also a posibility that no one has considered is that Sai will die!, i think he's bonds to naruto have become too great that as well as Sasuke did agains Haku Sai will protect naruto agains pein's attack
Like i said before naruto will bust some of the Fourth's jutsu, he will get confused with him since they look so much a like, theeen someone will tell naruto about his father...maybe Tsunade with her last breath, or Kakashi will tell naurto "there is something u need to know" dramatic music plays manga ends hahaha