I-Ninja 2 was a real thing once, now it's not
Siliconera's carrying concept art for an I-Ninja sequel. At least, it was a sequel. Now it's not. It was greenlit, but never announced. You can get more on it at the link. The first game, published by Namco, launched in 2003 on PS2, Xbox, PC and GameCube. If you don't know about it, you can read what the fuss was about here.