Yes the 3 will fight and beat them.
This heavy hitters will change nothing lol, the Scabbards will have 2 main focus:
Kaido and Orochi.
Kidd alread had his fight and is getting warmed up by the hundreds of gifters, same with Killer.
Law is already on his way to fight Kaido.
Luffy, Law, Kidd and Killer will fight Kaido ever since the beginning; Zoro will arrive later after he beats King.
Sanji is probably getting a stealth mission before he runs into Queen, since when he dips is actually when he's really useful. Then he joins the fight against Kaido after he finishes his 1v1.
Inuarashi and Nekomamushi are saving their Sulong for Kaido, they may clash and fight Jack for a while but Jimbe will show up making them go further, same way he did with Moriah back in MarineFord.
Denjiro, Kawamatsu, Shutenmaru, Kiku will all go straight to Kaido.
Raizo will deal with Fukurujou since they're rivals before he heads towards Kaido.
Kinemon will fight Kanjuro (not sure if alone, probably not) since they got a story, specially since he's the leader and Momo was beat up by Kanjuro recently.
As for Marco, Izo and etc. they'll all focus Kaido as well.
Bepo, Heat will probably help against Kaido as well.
Drake and Apoo will show up at some point as well.
Weak trio and mid trio will probably fight the F6 with some help from minks and yakuza leaders (there's 4 iirc) while old man Hyo will fight Kaido.
Also F6 were never supposed to be relevant against people who are in the high tier or above, they're just cocky fellas lol.
As for BM, she'll be there with Kaido as well, probably when she hears/senses Luffy is there unless Oda makes her go full hunger pants and she just keeps destroying the island, but even in this case she would eventually get to where Kaido and the rest is. Perospero will of course be guiding/protecting his mom (altho he may fight and get defeated by someone or a group).