There is a scene after the closing credits: Agent Coulson arrives in New Mexico and locates a crater in which lies the war hammer Mjolnir. This was a contracted version of the same scene from Thor (2011).
The theatrical end credits incorrectly list current AC/DC lead singer Brian Johnson as a co-songwriter for AC/DC's "Highway to Hell", when it should have been the late Bon Scott.
In the opening credits, Ivan Vanko constructs an arc reactor.