They indeed have to separated, Luffy can't handle two Yonkou at the same time. So yeah, I think it does sound plausible to have her shift her focus on the AW instead, since their original goal is that anyway. Luffy comes second when it comes to those weapons. But since I forgot a lot of details from the earlier chapters, for now, on the surrface, only Luffy and his crew knew about Shirahoshi right?
I'm in full agreement because we know Big Mom has the best intel gathering (and might even exceed what the Marines/Government can do). Luffy, his crew, Shirahoshi's family (possibly other high ranking Gyojin like Neptune's right hand guy, the non-fighter), and Caribou are the shown people who know her true identity. There is the possibility that someone saw her using her power, but we know Van Decker forced her into captivity not soon after. Oh, duh. Him too. Ah, this is where the info probably gets leaked if anything.>
And I know that I've said this a lot, while I do know that right now Luffy doesn't stand a chance against Kaido (or any of the Yonkou) I'd like to see him have a proper fight, and not the kind of fight where he manages to hurt Kaido because he's half dead or something. We're almost at the end. Though I'm indeed curious to know if Yamato is going to take part in taking down his father too. And is the war Oda talking about really going to happen in Wano, or is it actually related to the AW instead?
How did you feel about the Luffy vs. Kaidou fight (where he ends up getting demolished)? You will probably enjoy the anime, because they added/expanded quite a bit, so it felt like a "proper fight" rather than just a teaser/undercard fight.
I'm blanking on how many chapters ago Wano Kuni started, but the rest of act 3 might be just as long as act 4 (all of the climax fights). Where Big Mom is determines how quickly act 5 can conclude. Especially if she goes back to WCI, then there is zero set-up needed to jump straight into the Big Mom War/WCI II arc. It feels like 30-40 chapters just for the rest of act 3 and 4.
Yamato almost has to be against a Tobi Roppou. We don't have enough allies that are at that level of combat capabilities.
And the war to make Marineford look small/petty almost has to be the final war against the Government (per my bias at least). 200+ countries against Luffy's alliance (Grand Fleet, RA, allied countries, Shirahoshi/Poseidon, and new allies to come => Vegapunk comes to mind because of the ties to the other scientists he worked with => so even if Vegapunk only does upgrades for the crew, his connections will be the additional power-ups and potentially allies from other Blues).