Nice to know more about the Rocky Port Incident, I'd love to see it explained in more detail in the future.
So, Sakazuki has a 5 billion bounty. I know the bounty is given to the position and not the person, but it's also a way for the narrative to subtle (and unreliable) powerscale. After all, the Admirals ended up in the same tier as the newer Emperors.
The other answers range from mildly interesting but not hard to figure out on our own to downright wasteful.