Ride against pros to see how fast they actually are. Simulate UCI mtb, XCO, XCC and have the pros as bots. Ride with or against the pros to get dusted. Probably have some logic that allows you to catch up every once in a while so you can keep getting dropped or have pros ride all laps while Ams ride a handicap # of laps. Simulate actual events, LeGets, Lake Placid, etc