I mean, Whitebeard outright says that Blackbeard isn't the man to take on the World Government and we know Post-Wano that Luffy is unambiguously that person.
We also know Teach is locked in the race for the Pirate King title, because he booted Law from it and took his rubbings and is the second character to mention the burned scar man.
Every indication leads to Teach being defeated around Laughtale and the World Government coming next. Which makes sense given how Oda's portrayed both factions post-Wano.