Oda literally said One Piece is a story to fight against 4 Emperors:
Oda also put 4 Emperors in bigger panels than even Imu:
Oda then again said One Piece story is finished once the treasure is found: (which aligns with 4 Emperors being final opponents)
Oda: ''Correct. Rather than wanting to stop, its that the series will end, because the MOST EXCITING PART of Luffy's adventure, being the story of ''what is the One Piece?'' will come to its conclusion.''
The most exciting part is finding One Piece, not Final War.
Also Oda: ''If Luffy can set sail from Wano safely, there will be developments on a global scale, a thrilling story the likes of which no one ever read before, I will draw 'the greatest battle ever' in OP history.''
Some people want Mihawk to be Zolo's final villain, but at the same time Buggy fighting Luffy as final villain makes no sense.
4 Emperors all fighting at the same time could be a greater battle than the fight against Government, with this way all of the things Oda said, and Mihawk / Shiryu would be Zolo's final opponent while Luffy fights Blackbeard as final villain.
If you disagree how you will have Mihawk as final villain for Zolo, but Government as final villain for Luffy, explain it.
Oda also put 4 Emperors in bigger panels than even Imu:

Oda then again said One Piece story is finished once the treasure is found: (which aligns with 4 Emperors being final opponents)
Oda: ''Correct. Rather than wanting to stop, its that the series will end, because the MOST EXCITING PART of Luffy's adventure, being the story of ''what is the One Piece?'' will come to its conclusion.''
The most exciting part is finding One Piece, not Final War.
Also Oda: ''If Luffy can set sail from Wano safely, there will be developments on a global scale, a thrilling story the likes of which no one ever read before, I will draw 'the greatest battle ever' in OP history.''
Some people want Mihawk to be Zolo's final villain, but at the same time Buggy fighting Luffy as final villain makes no sense.
4 Emperors all fighting at the same time could be a greater battle than the fight against Government, with this way all of the things Oda said, and Mihawk / Shiryu would be Zolo's final opponent while Luffy fights Blackbeard as final villain.
If you disagree how you will have Mihawk as final villain for Zolo, but Government as final villain for Luffy, explain it.