Obviously dont have to answer all of them but still
- How did he join roger?
- Why was he given his strawhat?
- Why was he crying to roger at the end of the oden flashback?
- What are his goals/asperations?
- Why did he give his arm up for luffy?
- How/why did he decide to rival the other emperors and essentially create the yonko system so recently?
- Whats his relations to the gorosei?
- Will he meet luffy again?