Act 5 hype
Act 4 will be a lot of fighting for Pluton.
Act 5 will be exposition/transition to a new island.
Bonus points if we get Lilith opening a Vegapunk lab in Elbaph, and Chimerapunk ending up in Wano, to use its recourses to make another new lab.
Vegapunk was introduced working on warp technology, and then sliding into the robot and getting stuck in it.
"Perhaps space time bend mid-warp".
IMO, Vegapunk was trying to find a way to warp himself off the island to escape, but couldn't get it right in time (this was his last attempted test).
Oda going full Star Gate and having portals leading from the Elbaph lab to the Wano lab makes a lot of sense.
We already know through the Gorosei that warping is possible, and Vegapunk was shown experimenting with it.
The WG trying to kill Vegapunk, and instead causing him to open two new labs in enemy territories, is the kind of fuck-ups I've come to expect from the World Government.