If he did it, Tobirama still wouldn't team up with Madara and he would actually cause a war and blame him for making his brother lose his life. Who agrees?
If hashirama killed himself, I think either Tobirama would kill Madara on the spot or Madara would recover and kill Tobirama and take control of the senju
Well i think Tobirama and Madara wuld become rivals and both wuld hate each other Madara and Tobirama wuld fight till death till one of them wuld win and becomme hokage then one of tho Senju clan destuction or Uchiha clan destruction.....