Zoro is obviously gonna become WSS before the end.
There is no way Oda is gonna have the WG/Imu fall, reveal what the One Piece is, the fate of Joyboy and will of D and all that then only go "Alright I hope you liked it, now time for what you all were really waiting for : Zoro vs Mihawk".
Luffy becoming the Pirate King, taking down the wg and accomplishing his real dream is the main event. The other strawhats' dream are secondary to Luffy's and are gonna get realized before.
Zoro is probably gonna defeat Mihawk somewhere during the battle royale between the four emperors for the one piece then he can go fight an admiral or a gorosei or whatever for his final fight. Doesn't mean Mihawk is weaker than them, their loss just hold more meaning to the story so it makes sense for it to happen after.
There is no way Oda is gonna have the WG/Imu fall, reveal what the One Piece is, the fate of Joyboy and will of D and all that then only go "Alright I hope you liked it, now time for what you all were really waiting for : Zoro vs Mihawk".
Luffy becoming the Pirate King, taking down the wg and accomplishing his real dream is the main event. The other strawhats' dream are secondary to Luffy's and are gonna get realized before.
Zoro is probably gonna defeat Mihawk somewhere during the battle royale between the four emperors for the one piece then he can go fight an admiral or a gorosei or whatever for his final fight. Doesn't mean Mihawk is weaker than them, their loss just hold more meaning to the story so it makes sense for it to happen after.