It's easier for CBS to just make something new, from both a business and a legal standpoint, than to take over some fanfilm. It's just too much of a rat's nest in terms of rights and contracts from the WGAw to CBS.
What about taking over from Bad Robot, setting a series in same "universe" with the same general feel? Essentially picking up from Star Trek 3? Would CBS be on the hook to compensate Bad Robot?
And thanks for taking time to answer some damn tedious questions, Maurice!
