How will Akainu be defeated?

Imu will order Akainu to do a great cleansing of the world. After he refuses (bc of course he does not want that) he will get Domi Reversied and forced to give the command to all Marines. The Marines will then have a civil war between those following Akainu's orders (as Akainu would usually demand) and those disobeying and doing what they think is right (what Akainu would usually hate and see as treason). Akainu will internally beg everyone to disobey him, seeing the faults in his ideology. He will finally be defeated / liberated by a combined attack from Luffy (pirate) and Coby (disobedient Marine). This scene will mirror Roger and Garp beating DR Rocks and those are also the two characters Akainu wanted to kill at Marineford.

I could not delete this theory so I edited it in this way. If anyone can tell me how to delete instead please comment.