Wolverine Origins as a workprint was enlightening about how movies actually get made though. Seeing Wade having no guns while on wires was like 'hang on, those are edited in later?'. Also the lack of bullet impacts during the helicopter chase actually made it better, whereas the movie in full form has those awful 'bullet splats' on the ground in front of the camera, which is more distracting than helpful.
That's the only workprint I've seen though.
Trying to threaten a studio with one is like, why.