Koei Tecmo has made a record with that brand.
The news were created for Ninja Gaiden saga lovers, and recently reported recently that Koei Tecmo has registered. Yaiba: Ninja Gaiden Z In the United States patent office (through Gematsu).
While they registered the previous Yaiba brand, this time Yaiba: Ninja Gaiden Z, and the company almost immediately uses Western trademarks, it is likely that we will soon see something like that.
Remember that Yaiba was Ninja Gaiden Z spinoff Ninja Gaiden series with an action hack and bar In 2014, the zombies were launched on the PlayStation 3, Xbox 360 and PC, despite the fact that it is Koei Tecmoena version for the current generation platform, although it is better to wait for the official announcement.
In the end, in any case, we will have more details.