The Remainder of this story arc takes up 22 chapters of the the Manga - that should be the next 11 or so episodes - however the story jumps around a lot

I think in about 2-3 episodes we will see the the Naruto/Gaara fight start - and then an episode with the Gaara flashbacks - then the next 6-8 episodes will be spread between that fight, the Hokage Fight and quick cuts to other scenes from the War.

But first we have to get the Shikamaru/sound scene and the end of Sasuke/Gaara out of the way.