Quote Originally Posted by Evergrey View Post
Same thing can be said about Fenrir. Nothing said that Fenrir would be a flying mount. It also came out before HW. (Released in patch 2.51.)
But since people kept whining on the forums about how they felt robbed that they had to spend all that MGP for it and it didn't even fly.

So there is no reason that Sleipnir would not be able to fly now.

Because like I said....they have to find a way for sleipnir to fly that is appropriate. The other mounts were obtainable with MGP..and in game currency. People paying 24 dollars are likely to complain if SE makes sleipnir fly in a way that those who purchased him with real currency wouldn't like. It's highly likely they are just trying to be careful with it.