Seeing Red

Richard Grayson is kidnapped along with 29 other teenagers. They are all forced to fight to the death untill only one is left standing. That last teen will become Deathstroke's protégé and will be next in line to carry on his legacy.
I honestly suck at descriptions but yeah, that's basically what's going on here.
Oh yeah, and it'll also be dark, feely and have sprinkles of Birdflash ('Cause who doesn't love Birdflash)