I wonder if Zoetrope/Coppola would even seriously consider licensing it. Coppola is an ardent supporter of Salva, so bringing Clownhouse & the history behind it back to the forefront is something that I think both of them would bristle at, especially after what happened with Jeepers Creepers 3. Hopefully they'll be able to get some kind of response from him.
If Dark Force has connections to Coppola, ask if his new cut of The Cotton Club will ever see the light of day.
Or any of the extra footage from Twixt that never surfaced after his original release plans never came to fruition (I know people hate that flick, but I love it).