My limited time event idea is this:
Kill Swap
When a player finishes a kill (could be fun to have it only be the person who actually does that final damage), their entire loadout is instantly swapped with that of the dead player's. Their gear is now in the dead player's deathbox and they have whatever that dead player had (like everything, not just weapons and ammo)
Why this can be fun:
-It's a disincentive to kill newly spawned players
-it promotes close quarters fights and teamwork
-it will slow down 3rd party attacks since the teams may have just swapped for pretty bad gear
-gatekeeping the zone will be very risky since you might just lose all your gear
-it challenges the core idea of looting in a battle royale game
-like everything else in gaming, others will find interesting and crazy ways to exploit the mechanic in their favor (like one player always having 2 Mozambique, low ammo, and a bunch of level one shotgun bolts just to get killed first and be looted by their teammates)
I hope this thread takes off and lots of people contribute.
