Next Gen, should get remastered into HD DVD. sound, video, picture should all be cleared up. The NCC-1701-D should be altered as to how it looked in the later seasons.
The whole show should be compltey remastered a far at they want to take it. DS9, Enterprise, and Voyager should be next to be remastered.
the Next Series should be set on an even newer Enterprise, the NCC-1701-G and be all HD.