If it were a story that takes place decades after the 1977 story, with the original cast, addressing their autumn years - without Lucas writing or directing - I'd be interested. I'd prefer a story-driven film as opposed to an action\special effects film. Something cerebral. It would have to exist in that vast, dark 1977 universe - not the overcrowded solar system Lucas morphed it all into after Empire.

*edit*

If it had so much as a single reference to the prequels, I'd pass. It would have to be an adult-oriented, serious film, void of a connection to the software\merchandise advertisement that is the prequel series.