Know why I love you guys? Because when you go too long without hearing new information about the next patch and expansion, you just go out there and make it up.
This video says it's by Fanatik, who you may remember has leaked some info about upcoming content before. This purports to be a video of the next expansion, situated in Northrend-- except that it's completely and totally fake. Some parts are better than others-- the last cinematic is ripped straight out of WC3, but the main screen looks OK, at least until you realize that it too is chopped together from the previous Warcraft game. Boubouille has a list over at MMO Champion of where everything in the video comes from, and it's all completely fake-- Fanatik didn't even create it.
Still, it would be nice to hear some official word from Blizzard about what's coming next, wouldn't it? Until then (probably around Blizzcon, if my instincts are correct), I guess we'll have to make do with this.