Wrathion Patch 5.4 = (Major Spoilers)
http://www.youtube.com/watch?v=IyoBopkwfTY
A new build will be coming to the 5.4 PTR soon! As always, take the datamined spell changes with a grain of salt, and refer to the official patch notes for confirmed changes.
Highlights include legendary capes and their 3D models, Tier armor models, new datamined glyphs, and Enduring Elixir of Wisdom, which hints at future micro-transactions with the Blizzard store.