1. Straight fight in an arena
a) Hand to Hand in standard equipment
b) Hand to Hand in basic Karate Gear
c) With their full standard gear
d) With whatever they can get their hands on with 2 hours of prep

2. Scenario Match.
a) They are put on opposite ends of San Fransisco in the Real World, in their standard gear, then given a thorough dossier of the other (basically, they are given as much info about one another as their respective enemies were able to find out) and instructions to kill the other by the end of the day
b) Same as the above, but instead of killing one another, John has to kill a corrupt CIA agent that Michael needs to protect
c) Same as the above, but this time it's Wick trying to protect a mob don from Weston