Dude this is actually taking an interesting turn, Sabo abandons his family a second time to save all the people in the Grey Terminal. And to make things even more interesting, we may see the first event that got Dragon his reputation, and how threatening he can be to the government. Is Dragon a Tactical genius, or is he himself so powerful that he was able to do the most damage. So many questions and undoubtly Oda won't answer all of them, if he does no one would take interest in Dragon's character and why he was so threatening. But what he does show may hint at how dangerous he is. I'm also willing to bet that Dragon takes Sabo under his wing, and Sabo is currently with Luffy's dad helping the Rebellion. Dragon also might be responsible for helping Luffy and Ace out of their predicament with Bluejam provided Bluejam survives this event.
This would seem to explain how Ace is more aware of who Luffy's father is much sooner and in more detail than Luffy did almost all of his living life. Because unless Garp told Ace who Luffy's father is, the only way Ace would know that Dragon is Luffy's father is if Dragon told him himself.
I don't know how many people will escape the Grey Terminal, and I personally hope that plenty of people do escape, afterall what is happening isn't all that surprising given noble nature, but it is still inhumane, and I would hope that at least some do escape the Grey terminal. Plus with Ace and Luffy inside the Grey Terminal and Dragon most likley fully aware that they are inside it, undoubtedly wil stop at nothing to help them get out alive, but he seems a little doubtful like there is a game of chance he is playing with what he is doing. The woman everyone sees at the end of the chapter, is either Ivankov (but i doubt it) it is likely to be Luffy's mother. There is not many other female figures that would be following Dragon around that we know of. The most interesting aspect so far about the whole flash back, is that Luffy has one more sworn brother, and we currently don't know if he is alive or dead. Since Luffy and Ace don't talk about him, odds are he died, or he disappeared with Dragon.
All opinions are welcome, I strongly discourage use of foul language (only in insulting or name calling). I encourage discussion and friendly arguing (it's good for the brain). If anyone wants to post their predictions, discussion, or a list of things they would like to put up in a poll, feel free to e-mail me at shadoweye12@hotmail.com