The Prime Sentinels are technically cyborgs, but yeah. And Spider-Man has the Living Brain and the Spider-Slayers as robotic enemies, if we can keep...
Presumably in jail as of the end of Hallows' Eve's mini, but she did seem pretty confident that she'd buy her way out, so if she shows up again . . ....
We saw with Horizon that it was mostly just an excuse for Silver Age wackiness and new costumes/gadgets, but most of the Horizon cast would never be...