Wowhead is saying that it's a crafted engineering two seater mount.
http://www.wowhead.com/news=210156/5...ngineering-pet
From looking at it I guess they're giving us the mount that Overspark uses during the Operation: Shieldwall daily A Kind of Magic. He flys in on it when you call him via his scouts. When he uses it he's shown standing on top of it with a slight glow from the top between the rotors and the scouts are picked up in the claw and dropped on the target.
I'll take this opportunity to say that it's extremely doubtful that the claw-copter in the picture I linked will actually be the mount. It will obviously be a brand new model loosely based on that old claw-copter.
I doubt it's that old claw model either but I'll be happy to be a flying claw even if it is, rather than a fancy new one.