This might be a dumb theory, but I'm honestly taking it kinda serious so I'll put it here instead.
I think the current cover story is going to feature the Vinsmoke brothers (maybe Reiju too, idk) regaining some of their emotions and finding "love" in various Charlotte girls. Yes, I'm playing shipping and pairing up Ichiji, Niji, and Yonji with Charlotte girls. This isn't out of nowhere though. It became a bit of a trend amongst the daughters in a desire for independence, dissatisfaction at having their love lives forced to follow Linlin's wims, which eventually turns into a loyalty to their spouse that overrules their fear/love for Linlin. It first it was just Lola, but now Praline and Chiffon have escaped too, with Pudding seeming like it's only the guilt stopping her from running away with Sanji. The whole incident very well could've kicked up some suppressed feelings in some of the other Charlotte daughters now.
I carry with this another theory that BM is gonna abduct King from Wano and kickstart an invasion of Elbaf to finally force a giant into her family. The only question left is what the 3rd race she's missing is. It's only fitting that, while BM thinks her dream is nearly within reach and is obsessing over finally achieving it, she doesn't notice her family is falling apart with her back turned.
I'm not gonna pick someone for Reiju, but I could be amused into shipping her with Yuen.
Starting with Yonji; Yonji always came across as the most immature and first to get physical. I'd say he needs a strong woman who can dominate/keep him in check and pair up nicely with his more physical build. Looking through the list, Charlotte Prim stands out strongly to me. As an octopus mermaid-human, her tentacle legs would make an amusing companion to Yonji's chain arms. As Praline's twin, it wouldn't be a stretch to have her wonder what possibly could've made her sister abandon the family, or ignite a longing of her own to escape. Having someone to aid them through the sea would certainly be of great help in escaping, and it's awfully convenient that she happened to be one of the children selected to dissect the brothers, and just happened to be excluded from the update of the book being lit on fire.
Niji is actually the hardest to nail down something to go with. All I can really go off is how he seemed the most vindictive to Sanji, but that goes away with the end of the arc. It's possible he's meant to be seen as an "angry middle child" I guess. Unfortunately, all that helps with is saying he needs someone who can be genuinely nice and treat him like an individual, which really can just be any daughter if Oda wants them to be. I'm really pulling at nothing here, but if I'm playing with Niji getting someone with emphasis on their legs, I guess Niji can have someone with emphasis on their arms. Conveniently, there's some quadruplet long-arm sisters (ignoring the brother) that can continue both themes here. Comparing Maple, Marble, and Myukuru I'm gonna personally guess Myukuru, but nothing really to go on.
Ichiji is the eldest, most serious, and the most objectionably focused on completing whatever their current goals are. I think it'd be best to have him contrast with his brothers by ending up with… how to say... someone simple and unassuming. Someone who doesn't really stand out compared to an Octopus mommy or Long-arm girl or a 3 eye'd girl. That's why what comes to mind is to have Ichiji somehow end up with one of the Decuplet girls. I really can't pick out one amongst the 5 of them, but the idea of a Decuplet wanting to escape and gain some independence empathizing with and falling for a quadruplet soldier practically writes itself.
And with that, the end of the cover story will feature the Vinsmokes sailing away from Totland with their new morality chains and a lonely, lonely Judge wondering where he went wrong.