Except Multiplex is literally empowered by the Firestorm Matrix, same as Firestorm. His origin is even interwoven into Firestorm’s origin. Multiplex was Martin Stein’s scientific rival, and their lives came to a head when both the villain and Stein/Ronnie were irradiated with the nuclear energies that gave them all their powers. Multiplex is and will always be a Firestorm villain first and foremost. It’s practically undeniable.
