Fan Casting Brainiac in Superman III: The Reign of Brainiac (1996)

Vril Dox, also known by the nickname B.R.A.I.N.I.A.C, short for Bionic Robotized Auto Intelligence Nurturing Interactive Computer, is the titular main antagonist of Superman III: The Reign of Brainiac. A sentient global Kryptonian supercomputer system built to help protect Krypton from any live-impending threats, but instead purposely caused the destruction of Krypton and now seeks to do the same to all populations in the galaxy, due to seeing all of them as “disgusting and unworthy filth” in order to replace them all with clones of himself so that all worlds can finally fit his twisted vision of "perfection" and so he alone may rule over the entire universe.