I haven't seen anything official on this, but a few streamers on twitch claim the game will be on sale tomorrow for ten dollars. I'm going to provide the link here so people can check out if it is indeed true. This is an absolute steal if true.
http://buy.guildwars2.com/store/gw2/en_US/html/pbPage.buyguildwars2
http://buy.guildwars2.com/store/gw2/en_US/html/pbPage.buyguildwars2