IIRC, shortly after the 2003(?) season, the GDC had groups of long time first mentors come up with game designs or game designs element and present them. I'm pretty sure I've seen pictures of people (Paul Copioli, Andy Baker, Ken Patton maybe...) sitting around waiting for the meeting to start. I'll see if I can find the thread.
[EDIT] Found it!
Link!
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