Whether Liam Neeson will reprise his villainous role of Ra's Al Ghul for the final film of Christopher Nolan's trilogy remains one of the biggest question marks hovering over "The Dark Knight Rises."

Rumors fill Internet forums, hyping the villain's potential return, but we'll let you decide if you want to seek out the clues. If you ask Neeson about "Rises," he might act a little confused.

When MTV News sat down with the Academy Award-nominated actor to discuss his upcoming film "The Grey," Neeson's role in "Batman Begins" slipped his mind for a second. "You're throwing me for a loop there," Neeson said after a long pause. "That's right. I was in 'Batman.' I trained him," he added in his best Ra's voice with a laugh.

While it's still up in the air whether he'll make an appearance, Neeson has already appeared in the form of a voice-over in the trailer for "The Dark Knight Rises," which recycled some of his lines from "Batman Begins." One of the hints that has been repeatedly dropped by people involved with the film is that the conclusion to the trilogy brings everything full-circle, perhaps referencing returning elements from "Batman Begins."

With the series drawing to a close, Neeson said he looks back fondly on the first two Batman films and is looking forward to the finale. "Chris Nolan's made wonderful films, very rich, dark and complex, especially ['The Dark Knight']. Of course, it was cloaked in tragedy," Neeson said, referencing the death of Heath Ledger.

But when it comes to "Rises," Neeson claims to be completely in the dark. "I'm eager to see this one," he said. "I haven't a f---ing clue what it's about."

Check out everything we've got on "The Dark Knight Rises."

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