They said they were going to have a look at the dvd's to see what could be done with them but that they intend to finish the best possible pre '97 laserdisc transfer.
Lucas released the dvd set to stop bootlegs. If a bootleg set can be better than his official release, it would embarass LFL even further and put a lot more pressure on him to give the films a proper release. I think the '07 boxset will be the best chance for a long time. Hopefully with all the searching they are doing in the Lucasfilm archives for actual bonus material, they might stumble across some prints. If I had to guess, I'd figure they'd be in the same area Lucas wisely kept the deleted scenes and original elements from bluescreen shots. Lucas just doesn't seem like the kind of guy who would throw anything out. It's been confirmed he has a copy of the Holiday Special, how else would you explain the cartoon excerps shown on the Jango feature from AotC disc two. They even considered addressing it in Empire of Dreams with excerps. And isn't it true he still has his original screenplay writings on paper. Lucas wants to have complete control over his films. I think he just resents how Star Wars took on a life of its own and he just can't accept that the movies belong to the fans, not him.