I remembered this half-sleeping idea I had one time for a business, you’d use some cool 3D printing device to design and manufacture custom Rock Em Sock Em robot heads, thereby empowering people to enact their dream battles in a safe and socially appropriate way.
There could be some obvious pre-made sets just off the shelf, like Elvis vs. James Brown, Chuck Norris vs. Bruce Lee, Mother Theresa vs. I don’t know, Genghis Khan or something, Gore Vidal vs. Ted Cruz, that kind of thing. For an extra fee I could also craft totally custom ones. Things like you vs. your boss, any two sports figures, kittens vs puppies, Vladamir Putin vs. Dolph Lundgrin from Rocky IV.
(I’m not saying it was a good idea, just that I remembered it.)