Robin in a Third?

I’m trying to stay away from DK spoilers, I’ve seen the Two-Face image which looks kick ass.
Cinema Blend is reporting on the third Batman film, and the rumor of Robin has cropped up again.

“Dark Victory” continues the story of “The Long Halloween” and seems
primarily focused on Two-Face, while introducing Batman’s sidekick Robin. Does
that mean we’ll get the return of the boy wonder in Batman 3? If the story
follows along this same track, it could.

For any of this complex storytelling to work, they’re going to need
director Christopher Nolan. From what our source tell us, he’ll be back for
Batman 3… but only Batman 3. Whether the series goes on from there is anybody’s
guess, but all indications are that no matter what happens Nolan quits the world
of Batman after the third one, and moves on to something else.

I’m well aware of the Gordon/Dent/Batman alliance from the books, so I knew that’s going to be in the film.
The reason I think Robin can work in the story that Nolan has set up, in the first movie Bruce was the student to a master that was like a father figure who turned out to be Ra’s Al Ghul. If Dick Grayson comes into the fray, Bruce is left with a delimea, how does how he train this stubborn/rebellious young man in the ways of the martial arts that his enemy taught him?
I’m all for Nolan finishing off his run with a third. But theirs always the Spider-Man 3 fear in the back of my mind.