It would have CG of the best ideas, and comments by famous guest physicists and other people in the related fields.
Interviews with creators and also the contributers (best and worst), where they live, what inspires them, etc.
It would have funny cause and effect permutations of the worst ideas.
Also,
it could have ideas that have been baked since the beginning of the Halfbakery.
The DVD could also contain any or all of the games that have been suggested, including one that could be called "Make it work." Where you add or take away certain items to make a certain idea work correctly or safely. If you can't make it work, you can't use it in the adventure game.
It could come with a blank DVD that could be used as a drink coaster.
Finally, it could have funny outtakes from the TV shows.