Collector's Edition: Treasure Goblin

EDIT:

Reaper of Souls Release Date Announced
The Battle.Net Shop was updated for the digital pre-purchase of Reaper of Souls--the release date is March 25th, 2014. Edit: since publishing this, Blizzard has added an official blog on the release date and deluxe perks, which we've included at the end of this article.

Reaper of Souls will cost $39.99 and the deluxe edition is $59.99. If you purchase the deluxe edition, you get a special [npc=74413] battle pet! Click on the image to check out his animations in our modelviewer--when he dies, he appears to spit out a lot of gold, just like in Diablo.

Source: Reaper of Souls Release Date is March 25, 2014, Talk Azeroth Episode 21 on WoD

EDIT:
You can even Create your own papercraft Treasure Goblin from Diablo III, if you just want the instructions see: Meet Lewt, the Papercraft Treasure Goblin
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Original Post:

A small PTR build was datamined today--it was revealed that the Diablo III: Reaper of Souls Collector's Edition will have a Treasure Goblin battle pet and achievement (Collector's Edition: Treasure Goblin and [item=106256]),

Source: Patch 5.4.2 PTR: Build 17585, Spell Changes and More

its a different universe so mabye not