Warning! Spoilers ahead for Teen Titans Academy #12
It looks like dark days are ahead for the Teen Titans now that Nightwing has seemingly left to join their greatest rival. Following the prevention of the apocalypse teased by the Titans' Future State series, Teen Titans Academy is now dealing with the fallout in their latest issue along with the identity reveal of DC's newest iteration of Red X. However, the resulting conflict has dark consequences for Dick Grayson and it's teased that he'll be allying himself with a classic foe in order to seek revenge.
In Teen Titans #12 from Tim Sheridan and Tom Derenick, it was revealed that the rogue student who had taken Nightwing's old Red X identity was Brick Pettirosso, a student who's been featured throughout the entire series thus far, looking to take down the Titans from within. This is because Brick was led to believe that Nightwing was his father which motivated him to seek revenge having grown up in Gotham's foster care system with abusive caregivers. However, Brick was nothing more than a weapon to be used by the second Red X who was the first to coopt Grayson's past identity. This Red X was the one who trained Brick and told him the lie about being Nightwing's son. Once the truth was out and in the open, the second Red X killed Brick so that Dick would have no choice but to live with the fact that he had failed him.
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While the second Red X escaped via a portal after promising a rematch with Nightwing, Brick died in Grayson's arms. As such, the end of the issue is teasing that Nightwing will begin a dark mission to make sure that "the right Red X is dead". Suggesting that there's only one man who can help
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