By all accounts the footage is in a poor state of repair so either it's the real deal (which Mark initially failed to recall filming) or Lucas has commissioned a pastiche recreation of scene which we know at some point had been storyboarded, filmed and scored and faked it to look like it was made back in the eighties and not very well maintained.

I can see why he would make such a play of releasing one but other than pulling one of the most high profile hoaxes since the Hitler Diaries for a joke I can't see why he would do the other.