Actually, I was glad to hear about Sabo in this chapter. We didn't see him since chapter 1060, so it's good. ^^ Perhaps, Oda will give hints about him.
We also had allusions about Lulusia and it's somehow connected to Vegapunk. I love how Oda reminds us of what happened to Sabo and this island.
Perhaps the weapon used is Uranus, perhaps Vegapunk found out how to use Uranus. Perhaps he got sight of very important files. People needed his knowledge about science to put it at full power.
In this chapter we are starting to see the connection between Vegapunk and Revolutionary Army. And of course, Oda had to link Vegapunk to Luffy before unleashing such an information.
(I'm crossing my fingers Dragon already knows Vegapunk personally. That man needs very strong people in the World Government to make it fall. I just don't want Dragon to be alone with his army, sounds impossible for me.)
It seems the Gorosei fears Vegapunk right now, otherwise they wouldn't send the CP-0 in order to kill him. Perhaps the Government didn't tell how they would use Uranus to the man.
(I'm also crossing my fingers the Revolutionary Army will have its opponents. Because right now it seems the military and the secret services target only the Straw Hats. It would be a shame.)
We also had an addition of Seraphim Kuma. Obviously Luffy's going to fight Lucci again, Kaku will fight someone but I want Zoro to have his rematch. I want to see Luffy's second-in-command vs who we called Dragon's former second-in-command. It's going to be very interesting.
I'm also glad to see Bonney as Kuma's daughter. It adds another connection between the Straw Hats and the Revolutionary Army. Maybe the girl is already a member. She met Sabo and she wants to tell about it to Luffy.
It's a story for another time. I'm just hoping we will get informations about him right after this arc or in the arc itself. It seems very important.