The new Disney deal with Lucasfilm doesn’t include the distribution rights to the pre-existing Star Wars films, all of which will remain with Fox. I assume that includes the Star Wars Holiday Special. In fact, Lucas’ deal with Fox doesn’t look to change in any way, so don’t go getting your hopes up for pristine Blu-ray editions of the original trilogy in their original versions – it’s really not likely to happen at all. The Lucas-Fox pact will have Han shooting second at least until… well, at least until somebody other than George Lucas is making the big decisions. Not to get morbid, but I remember what it took for Stanley Kubrick‘s Clockwork Orange to get “unbanned” in the UK, and that was Kubrick passing away.
Distribution rights to the upcoming films will sit entirely with Disney. This means that any future complete edition boxset will require some kind of deal making by both studios, though that “full set” concept seems to have lost a lot of currency tonight with the promise of new Star Wars every couple-few years for generations to come.