I contributed two proposals to serialized internet cartoon pot. The first was The Cauldron, a police procedural set in a world of magic. The second was a very loose adaptation of William Hope Hodgson’s The Boats of the Glenn Carig that I called Sargasso.
The Cauldron got rejected because it was thought to be too similar to a television series that was about to begin on the UPN network. I don’t remember why Sargasso was rejected.