Yes, I’m stealing from Clash of Clans here. Yes, other people have probably thought of this idea, but I just thought to bring it up here for further discussion.
We got Hourglass PvP, and that came with some awesome rewards. We got Guilds, which also seems cool. But combine the two, and you have guild wars. With this system, a guild could be pledged to either of the PvP factions from HG or just be a separate leveling system on its own, and both parties could earn some pretty decent rewards like gold and cosmetics, with the winner earning even more prestigious rewards. If this system were to be tied to the Servants and Guardians, some new rewards for those factions could be unlocked as well, like the long-awaited Burning Blade ship set and skeleton lord cosmetics.
With this system, the guild leaders could vote to start a war, and a guild for you to fight would be selected at random, and during scheduled times you could queue into battles against the enemy guild.
I know this is not an original idea, Clash did it first, but adding this system to Sea of Thieves would make the Guild system feel that much more alive.
