Is Guardian Hearts Q Entertainment’s Next Game?

We have been wondering what Rez creator Tetsuya Mizuguchi has been up to. He hasn't been up to much recently, or has he?

Game site Siliconera found a trademark for Guardian Hearts, which was filed by Mizuguchi's company Q Entertainment.

This is the sixth trademark filed since Q Entertainment was founded in 2003. The others are: Meteos, Q? (company logo), Lumines, Every Extend Extra and the band Genki Rockets.

Is Guardian Hearts Q Entertainment's Next Game? [Siliconera]