This idea might not be possible due to scripting limits, but I'm not sure about that.

The StuntWar is public, everyone can join. I was thinking about having a stunt challenge with only one friend, 2 or 3 (or more).
This is how it would work:
First you get a jetpack, or something and stay on the spot where the red marker should be. Then  type /stuntchallenge ID (if you want to challenge one more player; there should be a players limit, i guess. The command could be another). EX: /stuntchallenge 22  (or /stuntchallenge PlayerName ). Id 22 will receive a message like "Player2 has challenged you to a stunt" (or something like that). He can /accept or /refuse  the challenge. But I presume that first time we talk and organize the event. In the future update will be the teleport command like /goto that would make the organizing easier.
So, after you type /stuntchallenge ID (ID .. ) and someone accepted, the stunt challenge can begin. The person that started the challenge will get in position and can give the start with a command like /startChallenge. If nobody can do it the challenge could end if invited persons /leave .
The event could take place on another world.

Advantages:
-Possibility to do a event only with your friends.
-Diversity of landing spots
-A fun activity that could keep us more active on server.

Disadvantages:
-The idea might not be possible so I kept you busy 2 minutes with reading this for nothing
-Some work to do with scripting