You already know that Tetsuya Nomura is working on Kingdom Hearts: Birth by Sleep and Final Fantasy Versus XIII, but Siliconera has a look at a patent application that may hint at yet another one of his projects -- possibly one of two that he recently mentioned. The application, filed by Square Enix, details a battle system (credited to Nomura) wherein characters inherit abilities from the last character used. A platform for the game isn't specifically mentioned in the application, but a diagram contained within seems to point to a portable system like the PSP. It's all speculation and flowcharts at the moment, but take those home, throw them in a pot, add some broth and some spiky hair. Baby, you've got an RPG stew going.