Meat Wagon Mount

With the launch of 8.1 I received the Meat Wagon mount and the achievement, 

Meat Marauder - owner of the Meat Wagon mount from Warcraft III: Reforged promotion.  

The Meat Wagon is a reward for the pre purchase of a new Blizzard game Warcraft III: Reforged. This is reimagining of a real-time strategy classic.  You can experience the epic origin stories of Warcraft with all new graphics and improved and updated gameplay.

Meat Wagon - A favourite unit of the Lich King, both for its power as a siege weapon, and the satisfying sound of flung meat.

This mount looks pretty awesome if a bit gruesome.  It is a model of a meat wagon from Warcraft III complete with blood and gore.

It has an special action (/mount special) which is to actually fling some meat using the trebuchet style arm.

As well the the World of Warcraft mount there are other rewards for the pre purchase of Warcraft III: Reforged for other Blizzard games such as:

Hearthstone - a special 'The Third War' card back.

Heroes of the Storm - four legendary characters from the Warcraft III saga. Jaina, Thrall, Anub'arak and Tyrande.

Diablo III - a pet (tbc)
along with other goodies to be revealed for Starcraft II and Starcraft: Remastered.