"Not Gotham?"
That was an answer Su Ming had not expected. Blüdhaven had barely had any presence over the years, much less any stories related to it.
Back when Nightwing and Batwoman had their falling-out, that little city had gotten some attention. Simply put, Nightwing felt that Batwoman had to control everything he did, leaving him with no freedom at all, like he could barely breathe.
He felt that at twenty, he was practically pushing thirty, yet he was still living beneath Big Daddy's dark shadow. It was too stifling, so he decided to split up and headed for Blüdhaven, 140 kilometers south of Gotham, hoping to make a name for himself.
Things had gotten pretty ugly back then. Nightwing had said something along the lines of, "Even if I starve to death in Blüdhaven or jump off the tallest building in that little city, I'll never go back to Gotham and eat a single bite of Batwoman's food."
He opened a cake shop there as a cover and invited Barbara and several others to join him. After all, young people all wanted to make a name for themselves.
And what happened? Once Infinite Crisis broke out, if the Justice League had not stepped in, they would all have died in Blüdhaven.
That incident during Infinite Crisis had happened long before Deathstroke's time travel. During that battle, Luthor detonated a new-concept nuclear bomb called "Chemo" in Blüdhaven. It was a massive living radioactive contaminant, and its explosion filled the city with radiation, turning it into a giant pit bubbling with green sludge.
In the end, Nightwing had still been forced to abide by The Law of 'It Smells So Good' and return to Gotham.
The Flashpoint Event, which occurred several years after Infinite Crisis, rebooted the multiverse and brought Blüdhaven