right cause the senju and uchiha are to call each other uncle aunt cousin etc.I doubt Hashirama would have intercourse with an Uchiha.
This is what i'm thinking.Ya!! I was thinking about the same kindda things.
In Ninja world, why weren't anyone from Uchiha clan in love with person from other.??
Some Uchiha, other than Sasuke must still exist.
But if Hashirama and A Uchiha were to have a baby, that baby might be the closest thing to Sage of six paths..
I don't think tobi if he's implanting eyes for the Rinnegan. (can't be all that strong naturally)you would get naruto ?? ot tobi