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 . . ....
Or worse, like 2099, a cyberpunk-style hellscape where megacorporations took over the world and perverted the legacy of those heroes with the intent...