Will there be another ninja gaiden

not sure when you asked this question, but until now there are: -old arcade ninja gaiden games-not sure how they are called, -ninja gaiden (xbox) -ninja gaiden black(improved ninja gaiden for xbox) -ninja gaiden sigma Σ (more improved version for PS3) -ninja gaiden 2 (for xbox 360) and in the next months there will be a release of: -ninja gaiden 2 sigma Σ (another version for ninja gaiden 2, for PS3)!!