A Big Clash between Blackbeard and Shanks incoming?

We’ve now started the Wano arc, probably the last arc of the Yonko Saga (except if Oda wants to make an extra large Saga).

But so far, it seems like only Kaido and Big Mom will be involved in the Wano conflict, including Luffy’s crew, his allies and possibly some of his fleet?

Blackbeard seems content with just observing events unfold and having fun, so it is unlikely he will come to Wano.

Shanks could come as a surprise near the end of the arc, but it would be a rehearse of the end of Marineford, so also unlikely. But we’ve seen during the Reverie that Shanks had a discussion with the Five Elders concerning the dangers of a “certain pirate”…

Assuming it is indeed Blackbeard, Shanks probably intends to declare war on Blackbeard. Adding the fact that Im was shown just after cutting Blackbeard and Luffy’s posters, Shanks could even have Marines helping him (maybe Vegapunk’s weapon to replace the Shichibukai?).

I just hope if it happens that we’ll see at least a bit of this battle, and not just another being told it happens in the background. Your thoughts?

*Theory by Aracn