simple idea (not mine) (could be similar ideas already, sorry) ; but make the instanced dungeons claimable by guilds.

-every week a different guild (based on some times challenge or something, as multiple guilds will want to challenge) will challenge the current owners ( 20vs20 for lower lvl instances, 40vs40 for higher ones) to a battle royale.

- the current owners can claim a tax on groups that run instances there and get a free teleport.

- could be challenged by either a defiant or guardian guild ...

- could introduce guild alliances so smaller guilds can make up the 20 to 40 ppl needed to challenge

-could be objectives, like control pts or could even leave a few of the bosses in there for some extra fun..

- not an open world pvp idea but would still be fun....

Thanks for reading.