"The Wolverine" tweaser -- as director James Mangold called it on Twitter -- is only six-seconds long, but features one big reveal: Jean Grey, TheWrap said.

Yes, the psychic-turned-psychopathic mutant named Phoenix (Famke Jannsen) who died at the hands (or claws, rather) of Wolverine (Hugh Jackman) at the end of "X-Men: The Last Stand" is back.

The story takes place after the "Last Stand" so she probably only exists in Wolverine's mind. Or does she?