My theory is a short one but I believe it could be plausible. Donflamingo says "to make sure I don't spill the beans on Mary Geoise's secret treasure to anyone. They have sent a killer to seal my lips once and for all, have they fu fu fu. Honestly, it shouldn't matter if people find out... Power has a very short life. It rots faster than you'd believe" Then we see Gold D. Rogers straw hat in Impale Down. So the only thing comes to mind is the following . 1) The chapter is called Mary Geoise. 2) Donflamingo is talking about Mary Geoise and its secrete. 3) we see Gold D. Rogers Hat. My only explanation is that Gold D. Roger is a Celestial Dragon, and One Piece is the heirloom/treasure that will allow one to become a Celestial Dragon, or tear it down to its roots. It could also be something that exposes the World Government and the Celestial Dragons. However, I think this chapter is implying that he is Celestial Dragon. Thoughts?