(As said in the thread) I do too believe that Imu's introduction/face reveal to the world will be him/her using the said ancient weapon to erase Egghead from the planet. Somehow broacasted in order for the world to see it and believe it's real. Imu's reveal being him/her blackmailing the world by either choosing his/her side or getting erased from existence.
Since Luffy said that Gorosei can't die, I would assume that they and Imu are probably alive since the beginning of the war, keepin control in the dark, but now forced to go public. Since the devil fruits goes from soul to soul, I wonder if it's possible for the current user to experience memories from past users/original form (like Luffy's seing Joyboy story).
Craziest reveal being no break next week