Synopsis:

After his wife and child are killed in a ninja turfwar, salaryman Fujikido Kenji gets possessed
by a mysterious ninja soul known as Naraku Ninja. As Naraku's craving for massacring
ninja overlaps with Fujikido's lust for revenge, together they bring Ninja Slayer – a terrifying ninja
killing Grim Reaper - into existence. The more their mental resonance and physical symbiosis
deepens, the more powerful Ninja Slayer's karate becomes. If Fujikido completely surrenders
himself to Naraku, the strength of his karate will become nearly invincible.

An anime adaptation by Trigger will be produced in 2015.

Until then totally check out the the manga & novel

Amusingly enought, i was going to say how the premise seemed a cheap Kill la Kill clone until reading that Trigger was interested. Honestly don't care for this much (something about this just doesn't look that good) but if it's Trigger there will surely at least be something interesting. While i said the same thing with KlK, i don't think this will be as successful.

We have a trailer:
Here

This looks pretty badass, is imaishi involved in this project?

I'll be keeping an eye on this, thats for sure.

Eh seems like mindless fun, im ok with this.