This also doesn't seem to be particularly supported in the canon. Which while that isn't necessary a limiting factor, I'd prefer to focus on aspects that actually bring some of the elements of the series into the game. In terms of elemental aspects, the entire system of elemental weaknesses isn't even touched on in TNR outside of bloodlines, there's no jutsu clashes with a fire jutsu being overpowered by a water jutsu, etc etc etc. In Naruto it really doesn't matter where they fight, they fight pretty much just as well as anywhere else - with the possible exception of water users who work better with pre-existing water sources, but like in the case of Kisame, that's not necessarily a restriction, there are easy ways around it.