I vote that you don't get to participate in CG4 because you tried your hardest to ruin it for everyone in CG3.
Nah, that's just stupid. I think in the end Erave's chapter worked really well as a portrayal of Dara's madness.
Aaanyway, I'd like to see a DUNGEON DWELLER. In the first chapter the party/main hero enter the dungeon. Then everyone adds more and more to it until there's a whole game. Could be an adventure in an UNDEAD CITY OF HORRORS or a SPACELAB OF SPACEPIRATES or an ANCIENT COLOSSAL VOLCANO. No world map or shit, just one HUGE place (with a lot of variation of course).
It wouldn't even need a lot of plot, you could just have a "He is the hero - he must pass the CAVE OF TRIALS" intro. Then people can concentrate on beautiful maps, good gameplay/puzzles without having to deal with a plot. It could be a different kind of a chain game. Hint - think enter the cave but as a chain game.
Also you could add a requirement that each chapter must have (good) gameplay. No wondering the desert for 5 minutes.