Nightwing, Vol. 2 Annual #2

Hero's Journey
As Nightwing recuperates from his injuries sustained during the Infinite Crisis, he and Barbara talk about the relationship between them that has spanned the years. But when it comes to choosing between her, and to travel with Bruce around the world, re-constructing the Batman along with his family, she denies him the choice by removing herself from the equation, despite his proposal on the eve of the Crisis.
Release Date: 2007