i'm against the corner version.. i couldn't stand it. I would love to have something ground breaking and new for a new game. Let take our times on this...
Nothingness: Ground breaking? What about a machine gun wielding number 1? dAGGER would like this too as it could all be over in a couple of moves :)
My vote is for atomic espionage, extinction espionage, the canon piece, the 3 game match and the 4 player individual (in order of ease of implementation).