SEGA is teaming up with producer Marc Platt (Drive) to develop a Shinobi feature film. Clearly just in the conceptual stages, there are no writers or director attached at this point. In the original 1987 game you played Joe Musashi, a ninja sent to rescue the kidnapped children of his clan. Musashi's backstory was fleshed out to reveal that he was once a weak boy who joined the clan and worked diligently to become their most skilled warrior. Later games revealed more, while others, such as Shadow Dancer, ditched Musashi altogether. So it's hard to figure where the movie might go.
We'll see where this goes. SEGA has a tendency to strike these deals and then have nothing actually happen. Remember that awesome live-action Sonic the Hedgehog movie? You don't because it never happened.