Do you think she would've joined in on the war after Obito attacked her? she would've been a great help especially with that ocean splitting jutsu she used against Obito.
Well if she hadn't died,obito wouldn't have got to nagatos body to get the eyes and this war would be a totally different scenario right now. Obito without the rinnegan, meaning he would'nt have revived the juubi.
She'd join the Shinobi alliance. There's no way she'll join the bad side right after what Obito did to her. But then again...she'll take away the fun too easily as she's a killing machine.
she would have had no impact on the remaining story, she would have drifted around the village hidden in the rain like a phantom until she died, maybe she comes out to aid naruto like once.
Also when you would have thought the Grass Village, Takigakura (where Kakuzu and Guy are from), and Amegakure would take part in the war....not do whatever they are doing...