I been having the impression that the Monster trio will end up as a thing.
I've been noticing that ever since we entered the NW(and even before with Whitebeard's crew), the amount of monsters of each crew has changed from 3 to 5
Whitebeard, Marco, Ace, Jozu and Thatch(well we don't really know how capable he was but being above Vista gives him points I guess)
there is Doula Mongo and his 4 seats
BM and the 4 Sweet Commanders(well we didn't get to know Snack but still they totaled 5 once)
Kaidou, 3 calamities and a Shogun, totaling 5.(I'd say Jack is coming back since he haven't had a 1v1, and unlike Vergo he's proven to be alive.)
the last groups are a lil stretched, but still seems to be 5 people only that are constantly present and clear.
Shanks, Beckman, Lucky Roo, Yassop aaaannd, one character that seems to be the closest thing they have to an ally, which is Mihawk, who's also likely to back up Shanks when the time to fight BB comes. still 5 people.
The marines, 3 admirals, 1 fleet admiral, and either Garp or Kong(most likely Garp since he's the only Vice-Admiral who seems to shine the most) could add up to total 5 monsters too.
and the last group is obviously BB's crew, from which I can't really say much since besides Shilliew I can't really see anyone else as 'monster'.
and then, we have the main crew, the add of a former Shichibukai, and a pacifista-like fighter are definitely strength to be considerable, and cannot simply be put apart from Zoro and Sanji, I member 2 years ago, the monster trio had to go all out against one pacifista alone, they won, but ended up all wasted, if Shogun Franky has control over this strength, he is with no doubt a new monster in the crew, not to even mention that besides the foodering-fest at Gyojin Island, the Shogun could hold and defeat against 2 of Doula's subordinates, and afterwards Oda saved it for Wano, instead of using it right at Dressrosa, and Jinbe speaks for himself too, considered to be one of the forces capable of keeping balance between the 3 great powers, 5 day fight against Ace, going thru hell from Impel Down to MarineFord, he's got real good stamina.
tbh, since Oda have really never acknowledged the Monster Trio has a thing, the only reason it exists, its simply because the crew was not completed, and not on its prime.
of course, we'll have to wait until Wano, but as for right now, at least we could consider that Zoro will be the one to face the Shogun(or a very strong bodyguard of him), while if Jack indeed comes back, seems to me that the Franky Shogun or Jinbe could actually take him down.
Even tho, with Marco, X-Drake, Kidd and Appo all around, is hard not to give proper opponents to the Worst Gens, since Law had taken over Vergo and Trebol already, showing that the SH's are not obligated to be the ones taking on the most threatening/strongest rivals of each arc.