WARNING: The following contains spoilers for Nightwing Annual #2, by Dan Jurgens, Travis Moore, Nick Filardi and Andworld Design, on sale now.
Dick Grayson -- or Ric Grayson, as he's been calling himself recently -- has really had an especially rough year. After being shot in the head by KGBeast in the pages of Batman, the former Robin awoke with severe amnesia, forgetting his entire superhero past and life beyond the tragic death of his parents years ago.
Nightwing Annual #2 fills in the time jump between the superhero enduring his grave injury and what led him to leave Gotham City and the Bat Family after his immediate recovery. In doing so, the issue reveals that Bruce Wayne's methodology in jogging his one-time youthful ward's memory is questionable at best, making the Caped Crusader one of the more reckless therapists in recent memory.
After recounting the circumstances of KGBeast's attack and the immediate aftermath, Batman has Grayson under top medical care in the world, flying in a specialist from Switzerland to personally oversee his rehabilitation. As Dick regains consciousness, it quickly becomes clear that the severe head trauma and damage to his brain has severly impacted his memory, since he doesn't recognize any of the assembled Bat-Family, including Bruce, Barbara Gordon or Damian Wayne. Frustrated, Bruce tasks the medical team with restoring Grayson's memories from beyond his parents' deaths.
Preferring to be called "Richard," as his mother had called him as a child, Grayson makes little to no apparent progress as his rehabilitation and therapy continues. Increasingly incensed by his partner's continued amnesia, Bruce decides to take manners directly into his own hands.
Despite concerns from Alfred Pennyworth and Damian, the Bat-Family welcomes Grayson into Wayne Manor to help provide him familiar surroundings to jog his lost memories and restore their beloved member. When this fails to provoke a response, the group takes things to the even more drastic measures and bring Grayson into the Batcave where Bruce reveals himself as Batman and Grayson's past as Robin and Nightwing is displayed.
As Grayson is shocked by the earth-shattering revelation that Bruce Wayne is Batman and that he was his crime-fighting partner for years, the family doubles down by showing Grayson is old costume. Housed in a glass display case like Jason Todd's old Robin uniform, Nightwing's outfit has not been cleaned since his traumatic incident, still visibly caked in his own blood . As Bruce grows even more desperate, he replays surveillance footage of Grayson on the rooftop of the Gotham City Police Department being shot in the head as Ric is forced to relive one of the worst days of his entire life.
Naturally, Grayson is completely horrified by the entire visit, including seeing his own blood-spattered uniform and footage of him enduring the more traumatic physical incident in his life. Leaving both the Batcave and Wayne Manor in a huff, Grayson swears off any association with the Bat-Family and vows never to return to Gotham as he makes his way to Bludhaven, which explains why Ric was so standoffish to Barbara when she came to visit him after he had established himself and his new identity in town.
With a noted reputation for being both a bit of a control freak and prone to bouts of intense impatience, Bruce Wayne subjected Dick Grayson to drastic measures in the hopes that the one-time Robin would regain his memories after developing trauma-fueled amnesia. In doing so, he completely exacerbated his protege's recovery and led to his retreat from the rest of the Bat-Family for the foreseeable future, with Grayson setting up in Bludhaven and targeted by the Court of Owls. Batman may be an expert in many different fields, but psychiatric rehabilitation is not one of them, apparently.