Im just going to refer to this reddit thread:
http://de.reddit.com/r/Guildwars2/comments/29p7jw/spoilers_looks_remarkably_like_the_realm_of/
And I would like to beg the developers: PLEASE, dont tease GW1 players towards the Realm of Torment and a “magical river” if it has nothing to do with the Domain of Anguish.
Please dont let it be some new developer, who found an old artwork and used it for something else.
I would be super happy if this would lead to a real elite area, like DoA was in GW1 because this is the main thing missing in GW2.
Just tell me its not a coincidence and this texture was designated to be there.