It seems like Big Mom has WCI, Kaidou has Wano, and Blackbeard is being saved for Raftel.
Elbaf is an island that's been hyped since near the beginning that was just stated to be the most powerful nation in One Piece, one strong enough to tip the scales in a war between Yonkou. Who is fit to be the arc villain of such a place? Green Bull? Eustass Kid? Loki? Akainu? Someone new? Who will drive the conflict on the land of Elbaf?