The untitled show often referred to as Star Wars: Underworld was developed by George Lucas himself but was abandoned after Disney acquired Lucasfilm.

In an interview with Collider, Moore talked about the development of the Star Wars: Underworld series.

And then he was going to go off and figure out how to produce them, because he wanted to do a lot of cutting edge technological stuff with CG and virtual sets and so on — And what happened was, you know, we wrote the scripts and then George said ‘OK, this is enough for now, and then I’ll get back to you, I want to look into all the production things.’ And then time went by and like a year or something after that is when he sold Lucasfilm to Disney.”.

Lucas had an epic vision for Star Wars; Underworld, Moore told Collider.

With nearly 48 scripts, this new Star Wars series could have easily had between four and six seasons, which would have been a real treat for fans

In a 2011 interview with G4’s Attack of the Show, Lucas explained that the shelved series is like a Star Wars movie in terms of budget and production