We’ve finally received a solid release date for the FFX/FFX-2 HD re-master. Square Enix has said that they’ll release the compilation on March 3rd, 2014.
Note that this is only for the PS3 version of the game; we’re still waiting to see about the Vita re-release.
There’s a trailer that Square Enix has cooked up as well, but know that it’s pretty heavy on the story details. If you don’t want to be spoiled, you’d be better off not watching it.