I think we're coming to the right time. You can't have a bigger climax than an all-out world war where thousands of ninja are dieing.
My prediction is this: Sasuke is ultimately redeemed by Naruto. Sasuke is revealed as the hero who ended Edo Tensei (along with Itachi), and then helps to defeat the final enemy (Tobi or Madara, it doesn't matter which. I suspect the two will merge together as one in the same). Sasuke, the redeemed hero, becomes Hokage ending the cycle of hatred and cleansing the Uchiha name. Naruto travels the world like Jiraya did, being friends with the Bijuu and spreading the message of peace of love.
It's a little corny, but I think that's the way the manga is heading.