Personally, the success of Game of Thrones and the fact that it is almost over and thus creating a bit of a void that needs filling, I think you'd be better off trying to sell something like the Codex to HBO or one of the other premium networks.  A shorter then usual season, longer then usual episodes, and the ability to use swearing and nudity (that second bit of particular importance where the Marat are concerned).  HBO in particular has shown to be capable of creating something on the scale the Codex requires.