http://www.ign.com/articles/2014/06/10/e3-2014-xenoblade-chronicles-x-coming-in-2015-2

During the Nintendo E3 Digital Event today, developer Monolith Soft revealed that X, its Macross/mech-inspired role-playing game, has been renamed Xenoblade Chronicles X.

Additionally, Xenoblade Chronicles X was given a 2015 release window.

Initially revealed during E3 2013, many speculated that X would be a successor to Wii’s more fantasy oriented Xenoblade Chronicles.