Rights issues aside (which is of course always the stumbling block with any franchise), this is why I think Jorune would have a much better chance of success under MRQII. As a setting-only book, with some additional rules to cover the races, the "magic" system, Earth-tec and Shanthic technology.
Laputa (a.k.a. "Castle in the Sky"), with it's levitating crystal core, has always reminded me of the sky realms. However, Farscape has forever ruined the idea of a "Hall of Drenn" for me ... :lol: