Egghead was such an info dump.
1 of the core details is the fact that VP revealed so much information to the world that people will start to search for Poneglyphs to obtain power for themselves.
Blackbeard has position himself really uniquely.
He says people are all looking for the Poneglyphs to find the One Piece, but he also mentions the fact that the WG are starving due to the RA.
Blackbeard could very possibly become the first Emperor to form an alliance with the WG. Reason being is he wants to legitimise Beehive Island as a WG affiliated country in the first place.
For Blackbeard/Oda to mention this in the story, it'd make no sense for Oda to mention such an outrageous plot development if it didn't happen.
Context: The WG are starving, and the holy land is being destroyed... they need help, they need a source of power to overcome this problem and additionally to stop the heightened age of Piracy that is arguably worse now since VP's speech.
And Blackbeard did suggest they're on their way to do something in Marijoa.
Reason how this could happen is this. The WG are already scared that so many people are now going to go after the One Piece. Blackbeard has a lot of pieces that could get him the One Piece, so he has bargaining power:
- Blackbeard has multiple Poneglyph.
- He has 3-eyed tribe girl, Pudding... who has the power to interpret the Poneglyphs if her eyes awaken which it probably will.
- Also has Caribou... who knows about Poseidon & Wano hiding Pluton.
- A defeated Garp (a lot more symbolic that I imagined it could be).
- Also, Catarina Devon copied Saturn.
Blackbeard can offer to defeat the RA as part of the price to become a king of a WG recognised nation... not only defeating the RA, but trading Garp (
ironic since he traded Ace to be Shichibukai) whom Imu probably loathes all the more now.
He can also promise to quit going after the One Piece since he more than any other crew besides Luffy can effectively find it. He has multiple Poneglyphs, and Pudding (
3 eyed tribe) who can read Poneglyphs once her eyes awaken... they'd be insane not to take this deal. This is surely a good compromise.
It would fix their immediate issue with power and make the WG an even more powerful organisation.
This would buy them time to focus on York acquiring the knowledge to use the Motherflame by which point, they can always betray Blackbeard after.
On top of that, Blackbeard having Caribou also means he has knowledge about Poseidon, and also knowledge about Pluton being in Wano. He could threaten to expose this information to the world if they don't make him a king of a country allied with the WG.
Not to forget either, Catarina Devon copied Saturn's identity, so she could easily make things even worse in Marijoa. She can infiltrate easily and acquire even more intelligence for Blackbeard.
If Blackbeard doesn't care that much about the One Piece, and only went after it for ambitious purposes. To become a king of a nation might be good enough for him.
He could equally do this and also secretly still go after the One Piece which would be more fitting of Blackbeard. If this deal came to be, Devon being able to transform into Saturn means she can easily acquire even more information from Marijoa.