In my opinion there's no way they'll ever clear the legal hurdles to get this a legitimate release. The best they can hope for is that no one shuts them down.
Ya the sad thing is your probably right. All those rich A-holes in hollywood are going to want their cut on the profits of some little fan made film. All those people that made those little film clips, helped provide the profits to keep the star wars franchise going so the least all those money hungry hollywood whores could do is let them put out this fan made film. And like Pilgermann suggested they should have this as a extra on the blueray.
The real problem is that you have to get legal clearances from more than just Lucasfilm, as the individuals who made them use other copyrighted/trademarked material in their submissions from a variety of sources. Each one of the 15 segment sections alone would probably count as fair use, but put all of them together as a commercial project it probably isn't. On the other hand I don't think Lucas has never tried to crack down on fan films---he knows they help butter his bread---so they'll probably never take any steps to shut it down.