"Why would they set up a whole thing at the end and then just give up on the franchise?" Kimmel asked Gordon-Levitt on "Jimmy Kimmel Live" Tuesday night, referring to the film's final moments, when Blake is given access to the Batcave following Bruce Wayne's retirement.
“This is the truth -- I don’t think ["The Dark Knight Rises"] is necessarily a set-up. I think it is the great ending for that trilogy,” he said.
“Even if you go back to Batman Begins, he’s talking about how Batman is more than a man, it’s a symbol, and a hero can be anybody and we all have heroes inside of us."
Gordon-Levitt also told The Hollywood Reporter that he had "no idea" if studio producers would consider a Robin or Nightwing addition to the franchise.
“I always choose scripts the same way,” he said. “If it’s a great script and a great filmmaker, then I’m interested.”
Gordon-Levitt has already worked with Batman trilogy director Christopher Nolan before, on "Dark Knight Rises" and "Inception."