NBC‘s single-camera comedy pilot Donor Party has been on hold because of difficulties casting the lead. The project, written by Alex Schemmer, centers on an irresponsible man forced to grow up when he discovers he has children resulting from his days as a sperm donor. I hear NBC went heavily after Rainn Wilson and Seann William Scott, offering both actors episodic guarantees, and decided to put a pin in the pilot after both passed. NBC has now slated the project, from Lionsgate, Media Talent Group and Universal TV, for off-season production. NBC also recently postponed drama pilot Wonderland because of the complexity of production for the Alice In Wonderland-themed project.