Last December, when the writer's strike had cast a shadow of boredom over the land, the film was indefinitely postponed. Production started back up when said strike ended -- but with the entertainment industry currently staring down the barrel of a Screen Actors Guild strike, work on the Castlevania film has been "derailed". According to an IGN interview with Anderson, future plans for the film won't be decided until the SAG strike has been resolved.
Also in said interview, Anderson confirms that he's taken himself off of the Rock-infused Spy Hunter film, due to the script being just as terrible as you'd expect it to be. Unlike Castlevania, which Anderson claims to be quite smitten with and wishes to finish, this is probably the last we're going to hear of Spy Hunter's potentially Oscar-worthy silver screen adaptation.