Implied is not directly stated. And I never saw the scene after the Iron Man credits.
Plus, in the scene between Stark & Ross, Stark did say that he thought the super-soldier program was a bad idea. He indicated that tampering with genetics would only lead to disaster, & tech was the way to go. How does that equate to creating the Avengers, which are headed by the FIRST super-soldier, & predominantly superhuman, w/Iron Man as the ONLY tech hero on the team? The conversation led me to think he was referring to the Hulkbusters.