Definitely Naut Blitzcrank
This halloween, let's have a sequel to Definitely Not Blitzcrank, called Definitely Naut Blitzcrank, with the robot dressed up as the diver. As well as being punny, it would be cool to see his fist attached to the end of Naut's anchor, and of course the necessary "sometimes I feel this anchor is just weighing me down, la de do la de da" in a mechanical voice while blitz swims around in the sky. His ult could be a blast of water, his mana shield could be colored to resemble Naut's W, but not so much that it's distracting if they're both in the game.

