Will Sasuke join naruto to kill madara?

Yes, after itachi sits on his thrown after killing orochimaru

The above is the original answer, but it was a long drawn out battle that Itachi planned ahead of time so that he could kill Orochimaru ( who Sasuke had somehow got his chakra ) destroying the curse mark on Sasuke and giving him his eyes.

He was sitting in the beginning, cast a Genjutsu which made it look like Sasuke had caught him unaware, etc etc cue the big long drawn out battle scene where it seems Itachi has won since there both drained of chakra and he still had Susano'o Botta-bing Botta-boom he touches Sasuke, says his final Words, and proceeds to collapse dying in the rain. Sasuke looks stunned, then he collapses next to him and passes out from chakra exhaustion.