I came up with a Daredevil storyline where a new crime syndicate is in town, and is looking to recruit a supervillain merc for their payroll. They contact ten candidates, and they have to kill each other. The last man standing gets the job and a $10 million paycheck.
However, the entire thing is a fraud. The "syndicate" is really the shattered remnant of The Scourge Of The Underworld organization (the guys who kill supervillains and make it look like it's athe work of one lone vigilante). Since they don't have the manpower to go after a bunch of villains, these guys are trying to get their targets to the dirty work for them.
Daredevil eventually figures it out and shuts down Scourge. He must then protect the Scourge agents from the survivors of the contest who are out for revenge at being manipulated.