From wiki:

Ninja Gaiden 3 will yet again feature Ryu Hayabusa as the main character. Although his black leather outfit from the previous two installments will make another appearance, Ryu has been seen with a new metallic black suit in recent screenshots. It has a few visible differences as well. His toes are now covered with metal, presumably used for his new Kunai Climb.


In the GameSpot video, it is revealed that Ryu gets a request from the Japanese Self-Defense Force, the Ministry of External Affairs. He is sent to London where he fights unidentified terrorists. Afterwards, he faces a mysterious hooded opponent who kills the Prime Minister. After the fight, the mysterious opponent tells Ryu to “open [his] eyes” and the Dragon Sword is absorbed into his right arm. Ryu escapes the missile firing and is picked up by Defense Forces. In the end cutscene, the mysterious hooded opponent appears on the news forecasting that every country in the world must agree to his surrender in 7 days, or will result in immediate destruction.