I think im coping that bb or cg gonna invade and thats why its still going because both are after pluton
YES!!! I've viewed Yamato's Cover Series as Wano Act 3.5 for a long time, and the reason is simple: what else is happening here besides set up? That's all Cover Series do: set-up. We have some set up that still hasn't even paid off (Gadatsu's Cover Series is... something, and Enel's Cover Series is a WILD ride, especially after Egghead's lore drops).
Buggy's Cover Series set up Logue Town.
Ace's Cover Series set up Ace vs Teach.
CP9's Cover Series set up CP0 happening Post Time Skip.
Jinbe's Cover Series led to Whole Cake Island.
Caribou's Cover Series led to Wano.
Yamato's Cover Series has been focused on... updating us on Wano. That's it. No real overarching conflict. Nothing. Just "here's where they are now".
We had Teach attack Law right outside Wano, then a two-day timeskip after Caribou went to meet Teach in Hachinosu. All 6 Yonkou (provided Kaido and Linlin are alive) are right near Wano.
Garp is worth 3 Billion Berries, no way Teach isn't going to take that money. When Teach and Cross Guild meet up to deliver Garp, I think Teach will propose an alliance to take over Wano. Cross Guild and the Blackbeard Pirates actually make a ton of sense together, and have very similar goals: Teach wants to rule the world, Crocodile and Mihawk want a nation with a strong military to form Croc's Utopia.
Blackbeard and Cross Guild move on Wano for Pluton; Shanks asks Luffy to form an alliance to stop it. Kaido and Linlin foreshadowed the rise of Yonkou Alliances.