Yes all good ideas.
I would also add:
Balance Beam Weightlifting---Each competitor would have to do a clean and jerk balanced precariously on the 4 inch wide beam.
Trampoline Badminton---Each competitor has to get the shuttlecock over the net while jumping on a trampoline.
Cowboys and Indians---Similiar to your suggestion of combining Equestrian with skeet Shooting. Last man alive wins.
Ultimate Fighting---Well...this one isn't really a strech. Throw the judoka, boxers, wrestlers, and Taekwando guys in a ring and let em' have it.
Triathlon Decathlon Marathon---You must complete all three events back to back to back.
Pirates and Buccaneers---Have a sword fight with your opponent while aboard your countries fastest yacht.
Pole Vault Diving---Run...stick your pole in the pool and then when you reach your peak height...bust out your best triple somersault.
Feild Hockey Cycling---Ride around on your bike and try to score goals.
and my sickest idea....
Javelin Freestyle---The swimmers and javelin throwers would combine on this one. If the swimmer can swim a lap without getting speared...he gets to drown the javelin thrower.
