Speaking during the Superman Day celebration, the scribe expressed his frustration about the creative differences and lack of freedom he experienced on the DC Comics title.
"I had no idea Grant Morrison was going to be working on another Superman title, I had no idea I was doing it five years ahead, which means, my story I couldn't do certain things without knowing what he did," Bleeding Cool quotes Pérez as saying.
"Grant wasn't telling everybody, so I was kind of stuck, who exists, DC couldn't give me answers. Oh my gosh, you're deciding all these things and you mean even you don't know what's going on in your books… so I became very frustrated."
Pérez admitted that he could not wait "to get off Superman" by the time his six-issue run came to an end earlier this year.
Dan Jurgens and Keith Giffen currently serve as the creative team on Superman, though Scott Lobdell is due to take over writing duties following the release of September's issue #0.