Siliconera: "Final Fantasy XIII has been in development for what feels like forever. Naturally, this means changes and thanks to a bunch of high resolution scans from FinalFantasy-XIII.net we can see how in game combat interface evolved.
The image on the right is a very old battle screenshot with Lightning. A vertically scrolling command menu is on the left. To the right of it you can see Lightning's stacked battle commands and her ATB meter which is reminiscent of previous Final Fantasy games. A mysterious meter is on the top right hand corner, but it's function was not disclosed."