Blackbeard is an opportunist and specializes in scheming, so he will definitely not ignore anything that benefits him.
The Four Emperor Kaido’s Hundred Beasts gang is very strong, that’s why in order to take back Luffy’s prey, Big Mom brought many of them to Wano to `reclaim someone`.
However, the two most expected names did not appear: Cracker and Katakuri, it is possible that these two sweet Commanders had to stay on Cake Island to recuperate and look after the house after the failed battle against Luffy.
Especially now, as soon as the Big Mom gang boldly set foot in Wano, the female Four Emperors were spat a few times by the Fire King, causing her to fall into the sea, life or death unknown.
This information makes me think that instead of going to Wano to have fun, Blackbeard will aim for Cake Island, because Big Mom’s kingdom is now like an `empty garden` to him.
Blackbeard has shown himself to be an expert planner and a master at coordinating small plans with existing conditions in a short period of time to achieve his goals.
On the other hand, we all know that Oda always likes `similarities` between events that take place before and after the timeskip, for example, Netherasta is similar to Dressrosa, Enies Lobby is similar to Whole Cake Island, which means Wano will be similar to Impel Down.
Let’s look back at what Blackbeard did in those arcs to guess what will happen next in One Piece!
Typically, Blackbeard invaded Impel Down to recruit powerful prisoners in prison 6 to strengthen his pirate crew.
If Oda really lets things go the same way then maybe Blackbeard will appear again in Wano at the end of the war, but I think before that he will go to Whole Cake Island to do some things in his favor
When arriving at Whole Cake Island, there is a high possibility that the Blackbeard faction will encounter Katakuri and an inevitable war will break out.
After removing the obstacle, Blackbeard can freely take what he wants from Big Mom (Road Poneglyph), just like what he did in Impel Down prison.
Having finished, he leisurely appeared in Wano as planned. When the `bulls and buffaloes` fought each other, he would become a profitable fisherman.