Dick Grayson "“ Nightwing

Dick Grayson was the first Robin and, in order to establish his own identity, eventually became a hero called Nightwing. In the Batman comic called "Knightfall", a villain named Bane broke Batman's back, so Dick Grayson was asked to step in. However, he declined, since he thought Nightwing was a strong enough figure on his own, but he took over for a while in the end, just until Bruce recovered. Someone else was Batman throughout the events of Knightfall, but I'll get to him later. After the events of "Final Crisis"  Bruce Wayne was supposedly killed by Darkseid, so  Dick  Grayson officially became Batman, until the event that started "New 52". Much like during Knightfall, Dick initially refused the offer, but he could not allow for someone else to take over and tarnish the image of Batman and accepted the role in the end. The upcoming animated movie "Batman: Bad Blood", will feature Dick Grayson as Batman for most of the film.