I was thinking the same thing. I doubt it means anything but Hancock being grouped with the strawhats while Yamato and Carrot are off to the sides is hella weird.
I find it odder that Yamato and Carrot are on opposing sides. It's almost like this entire thread visualized lol. But tbh Oda isn't going to spoil any further joins until the end of the arc. If both are meant to join, then so be it. It would be a cool outcome, I just thought that was an interesting observation.
If Aokiji does stick with Blackbeard for whatever reason, it would be interesting if he's involved against the crew for his own motives. That would make it 12 vs 12 lol. He'd then betray blackbeard after