Flash Thompson was created in 1962.

Flash Thompson

he is not seen at all

Actually, no. Peter Parker's childhood enemy, Flash Thompson, went into the army and he returned as Agent Venom. He had enlisted as a part of Project Rebirth 2.0 and he had become bonded with the symbiote. Now he had Power and strength like Spiderman, but he called himself Agent Venom. Eddie Brock is no longer Venom. Now Flash Thompson is.

Mac Gargan.... Eddie Brock is in a coma and will have the suit once again