Nightwing & Flamebird vs Midnighter & Apollo
Chris Kent and Thara Ak-Var, hosting Nightwing and Flamebird, respectively
VS
Midnighter and Apollo, from the Authority comics
They are fighting in Times Square. To win one side must kill or incapacitate their opponents. They know nothing of each other prior to the fight. There are lots of civilians around. They all have their standard powers and gear.