I heard something on the Revenge Of The Sith Disc 2 that McCallum said that "some day when he makes the revised versions maybe we will get to see Yoda landing on Degobah in Episode III" So i think right now he is remaking the PT for the Ultimate Box Set Edition for the 30th Anniversary of Star Wars. So maybe hes going to remake the whole trilogy and we will finally get to see a blue lightsaber for Luke in A New Hope or he is just remaking the PT for the box set release next year.