TVShowsOnDVD has posted a list of the extras for the upcoming 20th Anniversary release of MST3K episodes. Their first MST3K set will, of course, have the standard, irrelevant inclusion of movie trailers for the enclosed episodes, but there will also be some worthwhile material.
First, there will be something called “The History of MST3K,” presumably a short (new?) documentary on the series. Perhaps more importantly, Shout Factory will be recording the upcoming Comic-Con reunion, and it will be included in this box set. Nice. Perhaps not quite as robust as I was expecting, but the Comic-Con footage will make this set more than worthwhile.