I don't think he's evil nor good. More "chaotic neutral". He wasn't really ever evil, just easily manipulated. Plus he made his path for 'revenge' darker than it could've been. Honestly, if he were to survive this war I doubt he'd be let back into the village after his crimes. Like it was said before, he'd either become a Kage of the Hidden Sound, or battle it out to the death with Naruto.