Here's the elephant in the room: Do you think with the thawing of relations between Portnoy and Petrucci that Portnoy may cooperate with future releases such as The Making of 6DOIT?
I hate to even get that discussion or rumors started but it seems more than a coincidence that they are finally doing this right after Portnoy did drums for Petrucci on his solo album and the LTE reunion.
Edit: In case you haven't kept up with it over the years, Portnoy was responsible for archiving all of demos, rehearsals, etc. Ytsejam Records seemed to be primarily his main interest, with the releases being mostly compiled by him with Petrucci handling the business aspect. When the split happened, Ytsejam Records remained property of Dream Theater but Portnoy kept the archive. Therefore, unless there was some type of cooperation, Portnoy couldn't release anything but the tapes remained his personal property so Petrucci couldn't release anything either.