you know what would rule? a royal rumble, like in the wwf, but in an arena the size of a football field (to accomodate the giant robots) 40 memorable anime characters duking it out for supremacy, one new one entering the fray every minute. it could be ongoing, and after one guy finishes animating one minute, another guy would pick up where he left off. Here's my picks for the first 5:
1:Mihoshi (Tenchi Muyo!)
2:Lina Inverse (Slayers)
3:Bolt Crank (Eat-Man '98)
4:Milly Thompson (Trigun)
5:Junpei (Those Who Hunt Elves)
It would basically continue until all 40 have entered and all but one are either defeated or knocked out of the arena. More and more popular characters would appear as it progresses, but generally there should be two characters maximum from any given series. The beauty of it is that as soon as one guy finishes a minute, anyone else can write the 'official' next minute, and if the last author approves, the last minute autolinks to it.