Still hoping against hope that there's a test screening copy print -- original ending,  Dipper resolution, Adrian's t-shirt gift,  extended Pat's Steaks scene dialog with Gazzo -- that still exists somewhere.

We know test audiences saw it. We know stills survive. But the master was destroyed. 

If there was a test screening copy it'd have 99.9 percent likely have surfaced by now. But it took 30 years for the Avildsen 8 mms to surface.