There are a lot of lists of worst movies based on comics and superheroes. Here is a list I put together based on superhero and comic movies based on Razzie Award Nominations and Wins. I’ve included Superbabies: Baby Geniuses 2, even though it is debatable whether it qualifies as a superhero movie.
Entries with astericks indicate that the awards were for actors who appeared in more than one movie (for example, Jessica Alba was nominated for Worst Actor for appearing in Fantastic Four and Into the Blue.)
Son of the Mask (1 Win)
Catwoman (4 wins)
Batman and Robin
Barb Wire (1 Win)
Howard the Duck (2 Wins)
Sheena: Queen of the Jungle
Superbabies: Baby Geniuses 2
Red Sonja (1 Win)
Fantastic Four: Rise of the Silver Surfer *
The Return of Swamp Thing (1 Win)
Fantastic Four **
Masters of the Universe
Superman IV: The Quest for Peace
The Mask ***
* Jessica Alba was nominated for Worst Actress for her roles in Fantastic Four: Rise of the Silver Surfer, Awake, and Good Luck Chuck. Jessica Alba was nominated for Worst Screen Couple with Ioan Grufudd in Fantastic Four: Rise of the Silver Surfer, with Hayden Christensen in Awake, and with Dane Cook in Good Luck Chuck.
** Jessica Alba was nominated for Worst Actress for her roles in Fantastic Four and Into the Blue.
*** Jim Carrey was nominated for Worst New Star for his roles in The Mask, Ace Ventura: Pet Detective, and Dumb and Dumber.