In the 1990s, Pérez left the spotlight, although he worked on several projects, including working on the "Jurassic Park" comic book adaptation of the movie for Topps Comics in 1993, adapted by Walt Simonson and pencilled by Gil Kane, with Pérez as inker, but most notably at Marvel Comics with "Sachs and Violens" and "Hulk: Future Imperfect", both written by Peter David. David has named Pérez his favorite artistic collaborator, and one of the three artists whose art has mostly closely matched the visuals he conceived when writing a comic book script (the others being Leonard Kirk and Dale Keown).