If you look at the concept art, it looks like the "anomaly" might be somewhere in Thanalan. whereas on the CGI-screenshot it looks more like Coerthas. Either way, the landscapes look completely different. It might just mean they decided to move the thing to a different area than originally planned, but it might also mean we'll be seeing these things in several places.

One thing I find a bit cool is that it looks like there's a path to walk around it, which suggests we might be able to climb it ^_^

It doesn't really look like a tree to me, so I personally doubt it's Yggdrasil. I have a feeling Yggdrasil will look a lot more grand, kinda like tha Mana Tree in Secret of Mana. It's how it's normally depicted in drawings/paintings anyway.



Also, doesn't Yggdrasil already exist? This thing is supposed to have suddenly popped up from nowhere.