I can see sage mode vs naruto going but even then naruto loses by a little becos pain never intended to kill naruto during his invasion if he has RM mode he can win against nagato and help others but that is no good and Itachi is too powerful he can use amaterasu and kill so many ppl because he can make like a gound of full of black flames so he can use it for a while and ppl like guy and kakshi no matter how good they are can't beat tosuka sword which fast and seals away the ppl it hits and nagato is also ood becaos she seems decently smart like how she planned on killing madara so she can definitely take some of the medium to high skill ninjas with relative ease. The only way konoha i can see winning is if they use good tactics and strategy against the three of them and shikaku and shikamaru could come up with something and can stop ppl with their shadow techs in which time they can take the offensive and that should never be underestimated however konoha is in a bad spot wit this fight and most likely gonna lose than win. I think naruto needs kyubi mode and that would even things up because that is huge powerboost but without unlikely konoha is gonna win.