User blog comment:Videogamep/Why is Sabo Such a Big Deal?/@comment-9022101-20131213004702/@comment-4899461-20131213043132

The man from the cover with Crocus has a hat very similar to the one Oars Jr. has, which Ace learned how to make in Wano Country. In order for that to be Yorki, he would have had to escape the grand line via the calm belt, re-enter the Grand Line, enter the new world, visit Wano, leave the Grand Line again, and then show up at Reverse Mountain (and this would have had to be his 3rd visit there). There's no way that character is Yorki. My bet is that it's someone from Roger's crew.