The 2012 Rittenhouse Marvel Greatest Heroes Complete Set includes 81 non-sport trading cards featuring characters from the Marvel franchise, such as Iron Man and Captain America. Manufactured by Rittenhouse in the United States, the set includes cards from movies like "Captain America: The First Avenger" and TV shows like "The Avengers." Each card is housed in a protective top loader, making it a valuable and well-preserved collectible for fans of Marvel's superheroes.