I can easily see this as the end for Imu.
I never thought he was the final villain.
So this plays well into my scenario...
I dont think he can beat Zoro, Luffy and Loki.
Heck, I dont think he can beat Zoro alone if Oda makes it into a serious fight.
When Zoro goes all out, Imu is fked. Especially if he is nerfed by leaving the castle...