Coming out in August is Final Fantasy XII International Zodiac Job System, a Japanese version of Final Fantasy XII with English voices and widescreen support. On top of adjusting the license grid to make twelve jobs, Square-Enix is making three of the guest characters playable. Larsa, Reddas and Vosser can be controlled when they appear as the fourth character in your party.
You will also be able to directly control Espers after summoning them. It’s a neat addition for fans to walk around the battlefield as Zeromus or Exdeath, but it probably won’t have a large effect on gameplay.