Saw this on the WoW subreddit for about 60 secs, before it was removed.
Guy says his friend works in graphics and showed this to him and doesn't know he snapped this picture.
User Lucetia transcribed this...
Says the following:
Level cap raised to 100
Explore Draenor as you travel through time
Introducing: Path of the Titans
New character models
Two new raids zones, nine new dungeons
New PvP platform: City Sieges
((Mod edit: added the image for you))
As people have pointed out, this has similarities to the MoP reveal. Here is a comparison: