Practically (but not fully) confirmed are: Hayden Christensen appearing as the ghost of Anakin at the end of Jedi. Ian McDiarmid appearing as the Emperor in the trilogy (yes, the trilogy. Does this mean the Emperor now makes an appearance in A New Hope?) A new CG Jabba for A New Hope. Naboo joins in the victory celebrations at the end of Return of the Jedi. Still rumoured are the infamous Greedo scene being reworked (again), Natalie Portman appearing in A New Hope and a much more energetic Lightsaber duel between Obi-Wan and Vader in A New Hope among other things.