The Universe Is Toast
The Universe Is Toast (often abbreviated as TUIT) refers to the title of the expected, but unproduced trilogy following Keen 6. In it, Keen was supposed to prevent the destruction of the entire universe, taking on his old arch-nemesis Mortimer McMire. Sadly, id Software decided that they had more productive projects to work on and the series remains merely a suggestion to this day.
There remains some support for the series, however, mainly in the form of two of the original id team, John Romero and Tom Hall. Tom especially has often expressed his desire to personally contribute to TUIT, most likely as a 3D platformer game. As yet, the only remaining obstacle to its production is the refusal of id Software to release the intellectual property rights back to its creator.
In Tom's own words:
"Well, I don't want to talk too much about it, as I may do it someday, but as you know from the end of Keen 6, Mortimer McMire is back, and he has big, bad plans for the end of the Universe as we know it...
If I can ever get the rights back to Keen, or if I can strike a deal with id so I have creative control of him forever, then you'll see Keen again. I don't want to start Keen back up, only to have him taken away again if he's successful. That just wouldn't seem fair.
I would love to do another Keen. My last idea for Keen 7-9 was a game world [that] was 3D, and at certain places the camera rotated with you for different games. It was halfway between Super Mario 64 and Pandemonium. This was two years before those games came out. I wish I'd been in a place where I could've made that happen back then.
I do miss the good ol' days of Keen. I love the universe and the gameplay, and I'd love to make another chapter in the saga. We will see how the future unfolds.."
- A Look Back on Commander Keen - source of the above quote and the name "The Universe is Toast"