I actually have been thinking about it and I think the WB crew is going to get owned Royally. Or the battle will at least be slightly one sided. I also think that every Shichibukai will have the ability to take down massive amounts of WB members. I don't know why people keep saying he's so strong. He's really old (albeit very large) and he's extremely sick (albeit still able to fight Shanks and make the sky tear a new one) I'll give you that he's one of the Yonkou of the New World. But I just don't see him hurting any of the warlords anytime soon.
Mihawk destroyed almost all of Dons Kriegs ships in one blow. And the most powerful sword in the world.
Doflamingo can control people. Enough said
Kuma can freaking shoot laser beams out of his mouth and send people away just by touching them.
With the right resources, Moria has the ability to make small armies in a mater of minutes. And Hogback was still with him. So I think he has some plans set for the big fight.
Jimbei is probably the strongest merman out there on the seas. And we know he was a former captain.
And last but not least Blackbeard. This guy is so strong that he'll probably be the main axle for the entire Shichibukai force. He already gave Shanks three scars across his left eye before he has his fruit. And he defeated one of the strongest fruit users in the series making him a Shichibukai member. His fruit can consume everything and I'm sure he has a plan to use it with the other members somehow.
In conclusion, saying WB's crew will get owned might be a bit of a stretch. But I think it'll be a little one sided towards the warlords.
Thoughts?