The official Guild Wars 2 site is teasing The Lost Shores, a "massive one-time word event that will change" the game's universe permanently starting next month.
Four images on the site are accompanied by two sentences, all dated to this month:
"Something stirs in the Sea of Sorrows... Unravel a mystery of monstrous proportions in The Lost Shores, a massive one-time world event that will change Tyria forever!"
The Sea of Sorrows is the game world's central sea.