I wouldn't say it is impossible. There is talk of making a Batgirl show for the DC streaming service and that isn't really that different from what a Nightwing show would be. So it would just be a Nightwing spinoff show from the already ongoing Titans show. They already have an actor in place and established in their DC streaming universe. So there is a path for it happening, unlike the Nightwing movie.
Not enough where it would effect the character in the comics. That is the point. He will need an other media adaptation with his name in the title to really change how DC views the character.