Depends who they capture and who they don’t. For example, if Buggy is captured then why give him a bump post-capture? Not that I think he will he though.
Let’s look at what their bounties were:
Dracule Mihawk - Unknown
Bartholomew Kuma - $296,000,000
Boa Hancock - $80,000,000
Buggy D. Clown - $15,000,000
Edward Weevil - $480,000,000
That’s the current group but I feel some of the “former” Shichibukai probably need updates as well (Crocodile, Gecko Moria, Trafalgar Law, Donflamingo (though being captured it would be pointless), and Jinbe).
Mihawk’s should be massive.
The dude strolled into Shanks crew with no fear and essentially tied him in swordsmanship. He’s endgame level for Zoro. The only things limiting his bounty is we’ve never seen him commit crimes, he doesn’t have a crew, and left alone he poses little to no threat. The worst thing he did in their eyes was mentor Zoro (not sure they even know that).
Based off recent reveals (can you picture him being below Jack?) I could see him easily in the Billion range. Most would agree he’s probably better than Katakuri.
Hopefully Kuma has been rescued and re-humanized (Oda please don’t do a “sabo is captured” crap). Hopefully the Revolutionaries were able to hit-and-run with Puma in hand. If so, he’s pretty damn strong when not nerfed. Plus, he was a revelation art spy. I don’t think he hits the 1B mark but 800,000,000 couldn’t be terribly far off.
Boa’s 80M is atrociously low. Her connection to Luffy, forming a more legitimate pirate crew, and actions at Marinford + what she’s about to should help her skyrocket. She is a woman so Oda won’t give her too much shine but 500,000,000 isn’t unrealistic.
Buggy is odd since he lost his giants too. He’s lost a good bit of strength and connections due to that but he always falls upwards. I would absolutely love to see him be a little more competent. Yes he’s sneaky but he trained under Roger and has survived the new world. Would be cool to see him hold his own better and be a little more respectable. He should get captured but if he doesn’t I could see 150,000,000 being the floor for his new bounty but I can’t picture higher than 300,000,000.
Weevil shouldn’t be moved too much. He’s been a Shichibukai for like 5 seconds. I’m sure he’d break 500,000,000.
Would love to see Crocodile more, Jinbe should be pretty high, Doffy won’t be locked up forever, I can’t remember but I think Law already got a bump recently, all involved Supernova will likely receive a bump as well.