Nightwing and his new old best friend Superman team up to punch some dreams!
The Spoilers:Dick has been having a bunch of nightmares since returning to his role as Nightwing, a lot of them featuring people he cares about getting murdered by a creepy skull guy and some robots. When he wakes up from the latest one, Superman is waiting for him, ready to help.
Pre-New 52 Superman recognizes the similarities in this world compared to his, so he's been on the look out for known threats from his world that might pop up in this world. Turns out Dr. Destiny is the source of Dick's nightmares, and there's an energy source linked directly towards him. So some Fortress of Solitude tech later, and Superman is in Dick's mind.
Nightmares go pretty normal, as in everyone dies. Superman suggests he bring Dick to someone he's more at ease, and that's Bludhaven. Superman tells Dick about his Dick (ha) and how he moved to Bludhaven to make it his own, turns out it works and they start fighting back against Dr. Destiny. Things escalate, and Dick uses the POWER OF FRIENDSHIP to fight back and eventually find Dr. Destiny, who is being used by Kobra as retaliation against Dick's recent blows to their empire.
Dick and Superman take out Kobra, call in the League, get a thumbs up from Batman, who offers Dick a ride home. Dick opts out asking for Batman to drop him off in Bludhaven instead.