With the back to basics feel DC wants to envoke with Rebirth it means many are headed back to Gotham. Doesn't that make it feel a little crowded?
Nightwing- Returning from being a spy to his Nightwing identity although Dick has the Titans, meaning he has an excuse to leave.
Batgirl- I think the Burnside story will wrap up bringing her back to Gotham. Working with BOP, which means at least two other heroes: Black Canary and Huntress.
Robin- Damian actually sounds like the one spending less time in the city and with the family. He'll be doing team ups in Super Sons and Teen Titans.
Red Robin, Spoiler, Orphan (Cass), Azrael and Batwoman- All will be in Detective Comics, some will be in Bruces' training camp. I'm not sure about Azrael staying I just saw him in the art. No idea where Bette Kane/Flamebird/Hawkfire is but she did work with Kate in the past.
Red Hood- Working undercover to take down the underworld of Gotham with Artemis and Bizarro (neither will be close to him at the start so I doubt they know what he's doing.) This job seems to require him to stay in Gotham but at least he's doing something different than the rest.
Duke Thomas- Is doing something with Batman in Batman All Star.
Batwing- No idea but Luke Fox and his family were in Gotham last I heard.
We Are Robin- Hundreds of kids Alfred brought together. I believe the series is cancelled and I haven't heard what's going to happen with this idea.
Batman- Naturally although he leaves the city a lot for team ups.