After a few whiskeys and watching the olympics, the wife and I came up with a multi-sport event which tried to combine the majority of disciplines in the olympics.
Hard to remember precisely what it was but I think:
Start off with a triathlon-style open water swim-cycle-run of some sort. Get the easy stuff out of the way.
Next, the canoe slalom. You go down the course as you get there, so it would have to be a bit more like the kayak/cross version
Then, the "archery" - this is a range of archery targets of various distances from 10m to 50m - with an array of field tools (javelin, shot, discus, hammer, bow and arrow - you can use each tool once) and you score time penalties based on where you hit the targets.
Then, some kind of obstacle course style event - get the long, high and triple jump stuff in there, but also some gymnastics style rings, vault, beam work etc. At the end of the obstacle course, there's a dive into a pool - again, time penalties for poor scores before a medley swim to the next event.
Out you get, straight onto your mountain bike for a cross-country biathlon style cycling and shooting course. Time penalties for missing your target or extra loops to ride like in the cross-country skiing.
Finish that and lift a few atlas stones before you get into a single-scull rowing boat to do a nifty km. Back to the start of the rowing, but this time in a sprint kayak.
Out of the water again for another multi-sport challenge.
This time, the basketball net. You have to get a waterpolo, volleyball, table tennis ball (and why not chuck the table tennis bat too), shuttlecock, tennis ball, rugby ball and basketball through the hoop before you can move on.
Onto the skateboard to go as quickly as possible through some dystopian urban wilderness
Out onto some sailing skiff where a wrestler tries to stop you from getting on the boat.
And sail over the finish line.
The winner wins the olympics.