Anyway, even if this is just a reuse of the 1993 transfers, at least there won't be dot-crawl and other artifacts like in many fan-versions!
And the colors/contrast will be what we remember, as opposed to the pumped-up versions on the 2004 DVDs.
And with the other comments, it seems likely that these won't just be straight transfers-to-DVD of the laserdiscs. The pre-ANH crawl is confirmed, that much is certain.
And thus, it's likely that the sound mixes won't be the ones from various laserdisc versions, either. If they're going true to their statement, they'll probably use the original-ORIGINAL mixes (although, multiple audio tracks with different mizes would be icing on the cake).