Its a possibility but he's already invaded moved inland towards Luffy
So unless he calls timeout with the scabbards so he can go get backup, its not likely he's going to go all the way back to the coast and then back to the capital
Sure sure, but he
did call in a battleship. It'd be weird if he did that only for it to drown off-panel trying to get into Wano
Might just be one of those things where it could get into Wano without explanation
Regardless this has nothing to do with the next SH
I mean, you can't deny that Aramaki being there
does lend a lot more credibility to the guardian deity theory. He does provide a threat big enough that it would require Yamato to stay in Wano.
So taking that into account with everything else I mentioned, then that means
1. Yamato has a pretty damn good reason to give up joining the Strawhats
2. A lot of decisions with Yamato's character don't seem to indicate that she's going to join the crew. Whether that be her lack of a role, her Devil Fruit's name, her design, etc.
3. Oda hasn't taken the time to show Yamato bonding with the crew, or even with Luffy for that matter. However he
has taken the time to showing her bond with Momo. Additionally, she and Momo seem to be foils to each other as they're practically complete opposites in every way
4. Yamato has had no character arc so far. But Yamato choosing to stay in Wano would show her going down her own path instead of merely imitating the achievements of Kozuki Oden
Granted we'll find out in 2 weeks anyway, but the set-up is all there. If she stays in Wano, it really wouldn't come out of left field if you were paying attention
I'm not saying she can't join but you can't deny that there is at least a very real possibility that she won't,
especially given what happened this chapter