You can't make it the way it was. The people involved are different now. Case in point, Lucas makes the PT. Case in point, Lucas, Ford and Speilberg make Crystal Skull. I doubt Gary Kurtz would be of any use, since he hasn't worked in three decades, and he wouldn't be the same person he was in 1980 anyway.

I wouldn't want a next trilogy that isn't different than the ones before it, there is nothing worse than repeating oneself for the sake of some "purist" argument which is an illusion anyway. The third trilogy was always designed to be stylistically different, and I think that's one of its strongest assets. Based on the mature, introspective and philosophical tone and subject matter Lucas said it would have explored, I think Nolan would have been a perfect fit for it given his sensibilities, strengths and the subject matter of his past work.