EDIT: here's some info
Announced recently were some returning faces in the development staff for Final Fantasy XII. Character design and 3D map designer will be Akihiko Yoshida, whose previous work includes character designs in Final Fantasy Tactics, Vagrant Story, and the Ogre Battle series. Art and direction is under Hideo Minaba, returning from the same position in Final Fantasy Tactics Advance, Final Fantasy V, and Final Fantasy IX. The director will be Jun Akiyama, who also worked for Vagrant Story and Final Fantasy Tactics.
Also, you may discover a connection between Final Fantasy Tactics Advance and FFXII. It is said that some secrets or map areas in FFXII could be found while playing FFTA for the GBA. No details are known yet.
Source: QUITER
not too much info yet, but it looks pretty cool so far