Comic Images' 1991 Incredible Hulk set emerged during the early boom of non-sports trading cards, when publishers capitalized on comic book IP to build collector interest beyond traditional baseball cards. The set captured the Hulk's enduring popularity in the comic world and represented the wave of licensed entertainment cards that defined early '90s collecting. "Who's Inside?" plays with the fundamental mystery of Bruce Banner's dual identity, making it a conceptually engaging card that appeals to both Hulk enthusiasts and those drawn to the psychological complexity of the character. It's the type of thematic selection that collectors appreciate for its wit and its ability to encapsulate what makes the character compelling.