With this new chapter it was confirmed that Big Mom and Kaido were part of the same crew just as Garp mentioned back in chapter 907 talking about ROCKS. So at least to me it’s pretty legit that they were two members of THAT crew. But not the captain. Why not? Because it’s said that the captain fell by the hands of Garp himself, so I assume that their once captain is now a fallen pirate (be it dead or alive). Now...I’d like to connect my theory with Gear 5’s speculation on youtube here: It basically points out what possible relations BM and Kaido could have had with ROCKS’ captain. He says that it could have been a giant-like man (to relate to BM wannabe giant) and maybe an Oars-like man (to relate to Kaido), and I totally agree with him. Now I’d like to go a little further and show some foreshadowing about who this captain could have been (of course it’s just speculation)... Chapter 606 ends with this exact scene And chapter 607 starts with this exact scene Now it could just be a coincidence that after the “hat” scene we get to see this one suddenly, but to me it could have a reason behind and that reason to me could be that the Giant Straw Hat we saw in Pangea Castle once belonged to ROCKS’ captain, who was a giant-like human. And my guess is, that man actually IS a member of Oars’ family. I wanna go as far as stating that man was actually the one that made Roger’s straw hat back in the days, as I see a parallel with THEIR SONS repaying that favor in this particular scene: Imagine if an Oars who liked wearing straw hats in the past made friends with Roger and gave him one, possibly giving him also the Will of D (maybe Roger inherited his by ROCKS’ captain) and in the future, the son of Roger payed back the favor by crafting one for that captain’s son.... .....now I wonder....who would like to wear giant hats? Oars’ lineage is my guess for ROCKS’ captain. The only creature Kaido would fear, his old captain. That’s why Moria wanted his corpse. What do you think?