Well consider Mei has only used 2 of her 5 releases in the battle she's not quite done yet.
In all honesty the shikkotsu forest should be for Tsunade
Hopefully A has a V3 stored up somewhere
Gaara pulls something out. It might be enough.
Oonoki is done though
But we know with enough heat Susanoo will melt the question is did the melting point on Susanoo increase. We also know that a melting Susanoo is structurally weaker than one that is not melting. And easier to break through. We know Jinton could clear through a Susanoo (unfortunately Oonoki is done). If Tsunade, Gaara, and Mei have some awesome thing up their sleeves it can still be won.