User blog comment:Ghmorello/Chapter 907: Game Of Empty Thrones/@comment-25161930-20180608120137/@comment-24850639-20180608151110

I always figured that would be either Vegapunk or Joy Boy. When it was initially teased everyone had kneejerk reactions that it was Kaido. Personally I'm hoping it's Joy Boy, especially with the reveal of the hat at the end of 906.