I wouldn't be surprised if we don't know untill they are released (or untill the first review of the set). I don't think the episodes actually have titles, so it would just be numbers listed. Casual fans probably wouldn't know the actual numbers off-hand (I only know a few actual episode numbers off-hand myself). Also, I've read that the first six seasons had special sequences before the opening that showed the number, and I know that these were cut from Noggin for time, so a lot of casal fans who watched the shows on Noggin might not know the episodes just by looking at the numbers (I am surprised that people at Muppet Central know the episode numbers for every episode on Noggin).