When GRIN went under last summer they were working on a Final Fantasy spinoff called Fortress that Square Enix cancelled and a sequel to Bionic Commando: Rearmed, but they also worked on at least on major pitch. Senior character artist and concept artist Joakim Hellstedt's online portfolio revealed some artwork and gameplay sketches from the "pitch" (no working title) that showed a ninja battling a dinosaur (looks like it was taken from Calvin and Hobbes) and a helicopter.
If you want to see more head over to Hellstedt's online portfolio, there is also some artwork from Fortress there.