A party will be organized in the bicycle tunnel of the Rijksmuseum by Audio Obscura on the 20th of October, just like last years ADE. Who will perform is still unknown, the organizrs promises to announce this on October the 44. And yes just like the previous edition, when the American DJ Maceo Plex played for 4 hours, the event is free!
You do need to subscribe however, more info on the whole thing is to be found here.