It was suggested by Whitebeard that somebody will appear to carry on the Will of Roger and Ace. I thought it was Luffy, so I don't really know why Sabo would be the one to inherit Ace will.
That's why I say he won't get past Burgess.
I am really confused about this chapter, personally Sabo being alive isn't something that amazing to me since i always knew he was alive, pretty boring but had a quite of Dialog which Oda needed to insert to explain events happening. I would say good story progression as to what Trebols role is, who the toy fruit user is and how she works, Bellamys devotion, Dellingers strength, where the factory is and where the deals take place, how Tontatta plan on getting there, the plans to do it. Also showing how D block was going, it was good to see how Rebecca is going and that she has a friend helping her to get to the finals.
Bellamy seems to be a "Double Agent", he loves Doflamingo no matter what he does to him but helps Luffy get out to beat him up. Bellamy has gotten his act together but he is seriously torn apart on what to do even though he doesn't actually say it.
Good story progression but personally boring on my part, more interested to see Fujitora and his decision, Doflamingo and his decisions, Violets influence on the Marines and what Big Mom will be doing if she stays around the other strawhats and if she will capture, follow or give up on them. Currently the Revolutionaries, Marines, Donquixote family and Big Moms decisions need to be known which will probably be mentioned in the next couple of chapters. Once we have this information we can see where this Arc is going to end up.
I don't think there will be another break until after 2-4 weeks. I can't remember the timetable off the top of my head.