Guild Wars 2

So BLU recently uploaded this video http://www.youtube.com/watch?v=q0KBcXW75zA
Do you guys have any ideas what this is all about?

I would make a guess and say, it’s about some kind of upcomming tournament.

In the center of the picture, there’s sth, which could be a “V”.
Yesterday there was the the “vVv King of the mists tournament”…
But, he probably wouldn’t make a Teaser for a tournament which is already one day later.