One Piece thread (Spoilers)

Its either Kuzan or someone new. I can't imagine it being mihawk, he does ride in a coffin specifically and would be sitting. You also have to consider Kuzan, known for birds, so it could be very well he's sailing on essentially a bird shapped iceburg. Also the frozen children/villains in Punk hazard maybe related to him, from him just collecting those who escaped impel down pen 6 as a vigilante. He has a stronger relationship with Punk hazard than mihawk. This was also a great picture to that;

Looking at the picture again that makes way more sense. To be honest I completely missed the part where he said something about Punk Hazard, as well as didn't realize that he is sitting on top, lol. Thought the whole thing was just a giant shadowy figure/boat.