More like a twisted version of Honda Tadakatsu from Sengoku Basara

The only reason I bother to mention it is because at present, Saban Brands apparently doesn't give much in way of favoring ToQGer for adaptation. Hypothetically speaking, if they did jump ahead to Ninninger while still adding a few elements of ToQGer, any visual similarity would only help the meshing of the two. We already know that part of the primary Ninninger mecha has a train component, so this just seems to lend itself to a future PR fusion of ToQGer/Ninninger. I'm not saying it will, but I am noting the possibility and if there is any tangible justification for doing so.

Those are some pretty cool villains.

What does that have to do with Ninninger?

AND we have voice actors!

*Gangetsu will be voiced by Mugihito Amachi, veteran of several anime projects.

*Raikura is indeed portrayed by Kenji Matsuda. :)

*Kyuemon's voice actress is Megumi Han, previously "Cure Princess."

For the yokai voiced by Matsuda Kenji who is all about being strong and hating Igasaki ninjas, I checked and it seems Gabi Raizou 蛾眉 雷蔵（がび　らいぞう） is correct. Matches the kanji in the scan.

Why are they wasting his talents on just being a voice? Why not actually have him be the villain in human form? :lol

It's not wasting, Kenji Matsuda is providing his voice, which is still necessary. Plus, he could also portray his character's human form. The series hasn't even started yet so you never know.

You never know.
Especially a man like Matsuda Kenji who is already well-known in tokusatsu as a Kamen Rider, a good guy werewolf kaijin, a makai knight, etc. I would love to see him in live action battling with Akaninger at some point in the show.

I hope so.

BTW, that was meant to be taken as a joke.