It was recently revealed that Yaiba: Ninja Gaiden Z will be out March 6 next year in Japan.
Yaiba: Ninja Gaiden Z, the zombie-centric Ninja Gaiden game, is on display at E3 and I can confirm one thing: there is at least one incident of panties raining from the sky.
That's a direct quote from this trailer for YAIBA: Ninja Gaiden Z. Just so you know what you're getting yourself in for.
Yaiba: Ninja Gaiden Z takes place in the world of Ninja Gaiden, but it's not canon, says Team Ninja's leader.
Mega Man co-creator Keiji Inafune is taking a stab at the Ninja Gaiden series with Yaiba: Ninja Gaiden Z, and by "taking a stab" I mean actively attempting to stab the star of the main Ninja Gaiden series in the throat with a sword.