Firstly, the Ice Zone, there are few concepts made from players and I'd love to see this one day. I think we need some kind of snowy map. Or even seasons as in weather seasons, so make it happen.
Secondly, I'd like a outpost, that acts like a Tortuga or any similar "safe zone" for pirates. Not with a real safezone, but strict rules instead and if someone breaks these rules, he gets marked on the map for everyone till he sinks or there are damned npc's pirates with their ships coming for him. This kind of theme.
And on the island, there should be no places to sell your loot, but social interactions instead, like a small arena, where it's legit to fight, with bets maybe. And some other things that fit these themes. There could be voyages started, who all can work together and stuff like that. Like a social hub of some sort. Maybe let us upgrade this place with community events, so this place can get bigger and more fortified, so we can fight of the pirates who don't listen to the pirate codex of this place.