We are entering the 5th generation of titans. Dick is teaching a new generation, he can’t take center stage their anymore he teaching the next crop ready for that. The titans will not be interfering with Gotham if you meant that. I don’t think the titans have ever been useful in any kind of crisis or world event. Their treatment in injustice and forever evil kind proves that DC still doesn’t think titans=justice league. That’s why they let the JL shut them down and let the Suicide squad and teen titans stay.
Nightwing gets to much out of Gotham/Batman to leave it