Might Guy vs Legendary Sanin

[Haizaki]

Gai stomps with the 8th Gate but definitely loses without it.

 

[Shitenshin no jutsu]

He wins if and ONLY IF he uses the 8th Gate. Otherwise he loses.

 

[KingHashirama]

Get slaughtered without commiting suicide. And then of course still has the chance to lose even with suicide attack, incase one of the sannin decides to hide .