[Admins]

The 'events' idea sounds good. Each week or so the conditions of the kingdom islands and the main island could be changed, so you have some monster invasion on one of the island, or you have a flood, massive numbers of worms and bees and snakes, different weather (when we add weather), lower prizes in shops, items can be found by digging (like easter eggs).
Then someone should also connect those things to introduce some kind of story or impression of history
(because the players have fought back the monster hordes the shop keepers have lowered their prizes and celebrate the victory, some players get a special golden naginata for their brave behaviour,
some other island could have bad rain, you see many worms, and water elementals coming out of the ground and hitting you)