Let's not forget the ever looming act 4 of wano that is gonna happen any day now
We're honestly reaching the end of the line. Caribou has told Teach about Pluton and Poseidon 2 days ago canonically. We're already at Elbaph.
If Act 4 happens, it will happen after Elbaph, IMO. I can't see it happening after Laugh Tale. There's a chance we get a Moon Arc, then go back to Wano for Pluton, but it's slim, to me.
The good news, is it's easy for the Straw Hats to get back to Wano when Teach or Imu invades.
WG couldn't invade Wano for years, because the Gorosei knew Pluton was stronger than them. BUT, now they have Imu: the WG can invade Wano, now, easily.
Straw Hats can either get the Kuma teleport, or use Shuri's Arrow Fruit to chart a course (just shoot an Arrow in the direction of Wano and follow it, Shuri is broken when it comes to navigating the Grand Line).
Teach and the WG will fight over Pluton, and the Straw Hats will show up to defend Wano. My question is still who shows up first, Blackbeard or Imu.
Obviously, my dream scenario is Imu getting interrupted here on Elbaph, to be told Blackbeard is invading Wano. My pants would launch into atmosphere.
I still believe Shiki will be tied to Uranus, as well.