Original Rare Australian Daybill movie poster, Cobra - John Alvin Artwork. Like Sylvester Stallone's Rocky and Rambo, the hero of Cobra is another original: Lt. Marlon Cobretti, a one-man assault force whose laser-mount submachine gun and pearl handled Colt .45 spit pure crime stopping venom. Rambo: First Blood Part II director rejoins Stallone for this thriller pitting Cobretti against a merciless serial killer. The trail leads to not one murderer but to an army of psychos bent on slashing their way to a "New Order"- and killing the inadvertent witness to their latest blood spree. Fortunately, Cobra is her protector.