Gotta admit, this chapter has me pretty curious about the rest of DoFlamingo's backstory. For one, he doesn't look or act anything like the other Celestial Dragon's we've seen.
So from what I get, the Donquixote family were the original royalty in Dressrosa, but they left to go live in Marejois 800 years ago when the World Government was formed. At that point they became World Nobles, and then the Riku Family (whom Rebecca is descended from) was selected to take the Donquixote family's place. Ten years ago, DoFlamingo and his crew came to Dressrosa and overthrew the Riku family, which is how DoFla became king. It's implied that the World Govt allowed it because he was a Celestial Dragon. Couple obvious questions -
1. What motivated DoFlamingo to take over Dressrosa? Was he trying to reclaim the Kingdom his family originally ruled over for some reason?
2. DoFla is nothing like the other Celestial Dragons (ie. walking around in those spacesuit things, being weak, etc.). Was he raised differently from the rest? Why did he leave Marejois? Is it possible that only one side of his family is "noble" blood?
3. Why would a Celestial Dragon become a pirate? And why would the World Govt give a Celestial Dragon a bounty in the first place? Is it possible they didn't know he was one at the time?
And then of course there's the stuff about his powers and his ideology. I have a feeling dude is going to be a pretty interesting villain. We already have more backstory on him than, say, Croc or Rob Lucci.