@Joy_Boy's_Will:
Question: How did Jack make it to Zou before the strawhats?
Tsuru was on Dressrosa when the strawhats left, then she was next seen escorting Doflamingo to impel Down. Given impel down is on the other side of the red line and the straw hats are moving towards the end of the new world wouldn't that escort ship be heading away from zou? Jack was shown preparing to attack the escort ship and free doflamingo, then next we hear that he has already destroyed a city/village on zou. How the heck did he get there so fast, and why would he even be there? Law had a vivre card pointing him to zou and it's supposedly hard to find. None of this makes sense to me :wassat:
Also given that Jack is probably uninjured(he's wrecking Zou) I see one of three possibilities being true.
1. He completely annihilated tsuru and crew -easily- and rescued Doflamingo. This could mean Tsuru is dead. 
2. He got cold feet, and didn't try to save doflamingo. (unlikely at best)
3. He used some sort of sneak attack to "get in and get out" with doflamingo - avoiding much of the confrontation with Tsuru.
Given that Tsuru is a long standing Marine Vet of slighty lesser repute than Garp I highly doubt Jack would have mopped the floor with her. But if he did.. wow. This'll really put Luffy's post time skip power level in perspective. I can't seem to picture Tsuru not putting up a good fight though, so i think #3 is most likely.
Can't really see any likely scenario in which Doflamingo hasn't escaped..
Again, he attacked Zou before he was shown going after Dofla.
And it wasn't just Tsuru, Sengoku and Fuji were there too.
And I imagine Jack might come back to Zou, seeing how he left a part of his crew there, Sheepshead and others, who I assume Mink tribe are fighting on a regular basis. Bepo, JB and those other 2 were covered in bandages.