A one shot about the invasion where Dick/Nightwing goes undercover instead of Artemis. It begins after the "final battle", and a little while later the team and the league finds out he is alive. Only Wally, Artemis and Kaldur know that Dick has been alive the whole time. Also, the whole thing with the crysillas or whatever it's called doesn't happen and therefore Wally doesn't get trapped in the speed force. Jason has also been resurrected and has become the Red Hood. In this there is Graybat/ Dickbabs and Spitfire. DISCLAIMER: I do not own the characters or Young Justice. They belong to DC comics. I only own part of the plot. All images used are not mine. I got them off google

Richard Al Guhl ran away from the League of Shadows at the age of 13, leaving behind his three year old brother, Damian and his inheritance, the League of Shadows itself. He ran away to Gotham and, not knowing his father's identity, ended up living on the streets, working as a hero at night. That is, until he meets Batman and becomes the ward of Bruce Wayne. Seven years later, he comes unknowingly across his younger brother, who gives him some shocking information; the identity of his father. DISCLAIMER: I DO NOT OWN THE CHARACTERS. THEY BELONG TO DC COMICS. I ONLY OWN THE PLOT. ALL IMAGES USED ARE NOT MINE. I GOT THEM FROM GOOGLE