Did we really need another Michael Bay movie? Well, Netflix seemed to think so. The auteur of such stinkers as “Transformers,” “Pearl Harbor,” “The Island,” “Armageddon,” “Transformers: Revenge of the Fallen,” “Transformers: The Last Night,” “Transformers: The Age of Instinction,” and “Bad Boys II” is back with the streaming giant’s latest big-budgeted extravaganza “6 Underground.”