The team at ArenaNet recently touched on the Revenant class on its livestream, and many details were revealed. One of the core features of the upcoming Heart of Thorns expansion, this class uses a few elements from Guild Wars, with the two legendary stances based on Mallyx the Unyielding (Nightfall) and King Jalis Ironhammer (Eye of the North). More info can be found at the Guild Wars 2 wiki.