Hmm, who would get to play Han? I doubt anyone could make him as great a character as Ford did in OTL (incidentally, Ford will probably never break into acting)... and who's old and distinguished enough to play Obi-Wan?
Hell, who would the director be? If the studio thinks it'll be a big hit maybe they'll get a big name... a Scorcese Star Wars, for example, might be interesting, though we might get DiCaprio as Luke.
Of course, all of that's avoiding the major butterflies no SW would have on such a world anyway- would a different movie series just take its place? And does Lucas still do some of the other things he did in OTL, like his partnership with Spielberg?