oh my god o.o Chimera! If this becomes a player mount.... just...just wow. xD I would be really excited about that.
It is strange that its an old word model though. Maybe its a placeholder? (probably not) maybe Garrosh brought some chimeras with him? maybe chimeras have not yet evolved into the outland chimera we know today? it defanately wasn't what I expected but its texture and animations are clearly above that of the chimeras we have now.
If the new chimera skin is just a more high tech old-world chimera I will be a bit disappointed but maybe this means we will get shiny new models for outland-skined chimeras too?
bottom line: lots of chimeras please!
EDIT:
I went through the clip frame by frame and it looks like the chimera is in fact standing
ON THE GROUND. Its wings are folded like that of a proto drake to support itself and just as the chimera fades into existence you can see his claws touching the ground for a brief moment before the orc's legs get in the way. also watching the vid in high-def makes it very obvious that the mount has new higher quality textures.