I don’t think so. If this was meant to be a long drawn out bout then sure, but right from the start the goal has just been to escape with Vegapunk.
I don’t see Vegapunk with all his knowledge leaving with the Strawhats, and the Seraphim & Mother Flame will likely stay in WG hands.
I don’t see all that happening if Kizaru goes down. I think everything is just leading up to an interruption, and there’s a lot of options for that: the giant robot, BB pirates, S-Bear..