Spider-Man 3 includes the made-up character of Gwen Stacy.
Gwendolyn Maxine `` Gwen '' Stacy is a fictional character who appears in American comic books published by Marvel Comics , usually as a supporting character in those featuring Spider-Man . Spider-Man 3 . During pre-production , Raimi originally wanted another villain to be included along with Sandman , but at the request of producer Avi Arad he added Venom , and the producers also requested the addition of Gwen Stacy .