If you were given a chance to do it again, would you still choose to kill him in the Valley of the End?
If you were given a chance to come back, would you choose to be his enemy again? Senju Pillar
If you were given a chance to do it again, would you still choose to build Konoha with him?
If you were given a chance to do it again, would you still choose to believe in the Moon Eye Project? Uchiha Madara
What is unbreakable between them is the bond, the fate that will not be broken unless their souls are gone.
How will everything end for them in their second life?
When Uchiha Madara, Senju Hashirama, Uchiha Senna, and Senju Tobirama are all reborn with the memories of their previous lives, what kind of waves will they create in the Warring States Period?
Intention: How to make waves when we meet again