I think the preview is misleading, it is edited in the way it seems like Sanji getting blow out by S-Shark. But in the scene in which we see Sanji flying there is some graphic effect after his vegaboots, like they are propelling Sanji on the wall and it seems it's not S-shark doing it.
Maybe I'm wrong and it is really a filler added by toei to show how S-Shark is powerful to make Sanji fly, but this it hype Sanji's exoskeleton when S-Shark can't even move him by an inch with a punch (and this toei can't absolutely change.)