
Anyone who has any concept of the capabilities of the DVD format has considered this idea.
The one person who hasn't considered this idea, and maybe never will, is Lucas himself.
Convincing Fox won't help us at all. I highly doubt they haven't already leaned on Lucas to release both cuts. Their interests lie with maximum profits, after all.
Since Lucas owns all rights to the films, he has the final say. Fox's opinion doesn't enter into it.