The 4 most well known Earth-based GL's go up against this little villain quartet.

Team GL
Hal Jordan
Kyle Rayner
Guy Gardner
John Stewart

Vs
Team Villain
Dr. Doom
Manchester Black
Magneto
Loki

1) In Khazan.
2) In character in Times Square.
3) 1 day of prep (a Doom-stomp, I assume, but the stuff the GL's could produce in that time is surely not to be sniffed at...).

GO!