Showbiz Spy says

LIAM Neeson has he’s returning to the Batman franchise but despite filming his comeback — he has no idea what’s in store for his character.

The Oscar winning star reprises his Batman Begins role of Ra Al Ghul in Dark Knight Rises but such was the secrecy on set he’s not likely to give away any plot spoilers. (Cinema, Liam Neeson, The Dark Knight Rises)