At the very least I'd like to definitely feature Tatooine early on just to demonstrate how different it was. I've been debating whether or not to have the Obi-Wan/Owen confrontation in the final moments of the last prequel, as truth be told the actual information given in the scene (Kenobi explaining to Lars what's happened and Lars' anger and resentment towards him) is almost less important to me than showing the crumbling authority and dying economy/livelihood of the planet. Hence demonstrating this world at three stages (Growing prosperous with some planetary authority, devastated by trade problems/conflict, a dusty rock with farmers just eking out a living).

There's a certain story redundancy to showing it yet again, but there's also some visual elements which intrigue me. As I said, that third prequel scene is still up in the air.