I watched a video with someone having the siren skull on an outpost. It causes skellies to spawn and it is hilarious to see them running around looking for players.
It made me think a world event where an outpost is not usable until either cleared or world event resets.
There would be a skull in the sky or some other notification that an outpost has been overran by skellies (or sea creatures, phantoms, etc.)
The shop doors, tent flaps, etc. would be closed and no NPCs are there. There would be waves of enemies similar to other world events. Could even get it interesting with ghost ships or skelly gallies patrolling around the outpost.
Loot would be significant to make it worth it. Have it spawn in the tavern after completion similar to Veils.
High seas only, to encourage players to either plan how they want to sell things to avoid other players OR ambush players trying to liberate an outpost.
The only arguments against it would be players who want to sell at that outpost, but you would have to pick another one or liberate the outpost.
Maybe with Flameheart's return we can see the battle expanding to outposts and players have to liberate?
