I like it!
Here's my thoughts on how we could do this... whoever's interested in finishing the UberEnding would PM me with a short (100-200 word) description of how it would play out i they inished it. I'll read the ideas, (possibly) confer with thatguy, and give co-authorship of the game to finish it.
How's that sound? Without revealing your ending or what you would do, show of hands... who would be interested in "applying" for this?