Screenwriter Karl Gajdusek (Trespass) has been brought aboard to rewrite Horizons, a Disney project formerly known as Oblivion.

We reported in October that Oscar-winning screenwriter William Monahan (The Departed) came on board to write the screenplay, which is based on the Radical Publishing graphic novel Oblivion. Now Karl Gajdusek is taking over the writing duties for the project, which centers on a soldier guarding a lifeless planet, who eventually encounters a mysterious traveler.

Tron: Legacy director Joseph Kosinski is attached to direct. Radical Pictures, the movie arm of Radical Publishing, is teaming up with Disney for the project. Joseph Kosinski, Barry Levine, and Jeffrey Silver will produce.

Related: BOX OFFICE PREDICTIONS: Will Oblivion Take the Top Spot This Weekend?

No production schedule was given for Horizons, although it is said this is a high priority for Disney.