I like the idea of Nightwing being a well-known figure among the hero community, but relatively unknown to the public outside of Gotham and Blüdhaven. Like, he was the first ever sidekick and a kid of one of the Justice League's founding members. Most older heroes are his aunts and uncles, the first generation of sidekicks are his friends, and to the younger ones, he is a mentor and older brother figure. The hero community loves him. But outside of that, he is just a local hero. He sticks to the shadows, and while the people of blüdhaven love him, and the people of Gotham have at least heard of him, he is not very well known.
That is until the Justice League hosts some sort of public event with a lot of younger heroes attending, and one journalist gets an idea for a fun, lighthearted story. They go around asking different heroes and sidekicks who their favorite hero is, and 80% have the same answer: Nightwing
