Every yonko seems to be a 2.0 version of some warlords
Kaido is like Kuma
Big mom is literally just moria on steroids
Shanks is mihawk
So I wouldn't be surprised if oda gives Blackbeard the same treatment as doffy
Having a doffy 2.0 as a final vilain doesn't sound too bad tbh, but I'm pretty sure Blackbeard will have a way better treatment