Big Mom and Kaido are looking like freakin monsters in that pic. It looks like some toddlers are in to fight their parents, honestly
It's strange tho.. On the one hand it would have been very difficult picturing them losing against just one of these guys. While on the other hand, it seems close to impossible for them to beat both.
Main damage dealers are definitely Luffy and Zoro though. If those two get shambled around it would be devastating even for the yonks.
And Luffy definitely is the main bulk in that group. He's the one who, even solo, really can do shit against either of them.. For the rest I really have to see what's going to happen.
I can see how they bring in attacks, that deal serious damage and such, but it's hard to picture them dealing with BM's homies for example.
I dunno what Killer's doing there though lol