Since production of HighDefinition DVD players was discontinued a few months ago there has been speculation about the fate of the remaining remastered TOS seasons. But Paramount recently announced that in august the 2nd season will be released, although it will only be on regular DVD, not HD-DVD.
No word yet on whether Paramount will move to HD-DVD competitor Blu-ray anytime soon, but ofcourse we'll keep you updated.
Source: TVShowsOnDvd.com