The viral marketing site for The Dark Knight, ibelieveinharveydenttoo.com, left fans a message from The Joker, saying 'See You in December.' Fans were left to wonder what the Joker might have meant by that statement.

According to the Brazillian site Omelete, by way of Batman On Film, there will be a 7 minute prologue for The Dark Knight, attached to the IMAX showings of I Am Legend, starring Will Smith.

The prologue will feature The Joker (Heath Ledger).

Related: Watch Michael Keaton Spoil Tim Burton's Batman on TV Night Before Premiere

I Am Legend opens December 14, 2007.

'See You in December' is beginning to make a lot more sense.

Cinemark Movie Club