He probably won't use it anymore at that point.
His Susanoo will shape into a tree. But I say it's off the charts.
I doubt it will happen. If anything he will eat the fruit of the tree. At least that's what I believe. I feel the fiery excitement of seeing the ten tails host has been doused, and wouldn't have such an impact anymore.
The fruit only gave chakra to humans , it will be useless to any shinobi right now.
Maybe....it could give him an intense amount of chakra to which he can perform techniques on an astronomical scale? Just a guess....