This thread should probably be renamed to the "Yamato fanclub" thread. It only has 2 modes: Yamato fans patting themselves on the back on how every panel is more proof that Yamato's a lock. Or someone trying to bring up an opposing possibility getting dogpiled by the Yamato fans on how stupid and impossible it is. The power this 1 character has over fans… I worry for Oda if he actually does go with any rout that ends with Yamato not joining the crew.
I'd say odds are we're going to Sphinx to visit Ace's grave next, and the Yamato question won't be solved until the end of that mini-arc. Until then, Yamato will just be one of multiple tagalongs going to visit Ace's grave. But I'm sure fans will treat them special the moment they step on the Sunny, while the rest of the tagalongs get rejected and ignored.
Mind you, I'm not "Yamato will stay in Wano forever" crowd. I think the closest we'd get to that is Yamato staying with Momo temporarily, and then the next major cover story being entirely about the beginning and first journey of the Yamato pirates. Yamato needs their own journey and is more than capable and motivated to lead their own.