Orson Scott Card is working on a sequel to the film Ender's Game, which opened Friday in the United States.

A proposed boycott of the film over Card's anti-gay views and his support of groups that oppose marriage equality have put a damper on the movie's release.

Until recently, Card, a Mormon, was a board member of the National Organization for Marriage (NOM), the nation's most vociferous opponent of marriage equality.

Producers have sought to distance the film from its author in recent months in a effort to head off the boycott. And this week, it was leaked that Card, who wrote the book the film is based on, “won't profit” from ticket sales.

“But multiple sources from both inside and outside the companies that produced the Ender's Game film – distributor Summit Entertainment, visual effects company Digital Domain and book-rights holder OddLot Entertainment – tell TheWrap that Card's fee [$1.5 million] has already been paid through a decade-old deal that includes no backend,” TheWrap reported.

However, Card told Wired that other projects hinge on the success or failure of Ender's Game, including a sequel already in the works.

“In terms of film, Ender's Game is actually the beginning, not the end,” Card said. “No one will touch anything else of mine until they see how Ender's Game does. Unless the film absolutely tanks, which I'm not expecting, then the floodgates could open. I have probably a dozen books that are much, much more doable on film than Ender's Game.”

(Related: Orson Scott Card says Ender's Game row over gay marriage not “true picture.”)