New "The Dark Knight" Poster, Joker Events Nationwide

The Joker's been busy. Following months of variously twisted/brilliant viral marketing stunts beginning with events at Comic-Con International in San Diego, The Joker struck again Tuesday afternoon with more developments in anticipation of The Dark Knight -- Christopher Nolan's sequel to his 2005 hit re-launch of the Batman film franchise, Batman Begins-- including the unveiling of a brand new one-sheet poster for the film.

Things began today when a new edition to The Joker's website whysoserious.com was discovered. Located at whysoserious.com/steprightup was a clock counting down to 12:00pm EST and a graphic of a decidedly weird-looking monkey doll. At the end of the countdown, the site updated with a Flash-based carnival game, the prizes for which included several stuffed toys as well as the previously seen monkey. 

Safety-pinned to each prize was a piece of writing paper with an address and instructions reading, Go Here and DON'T CALL THAT'S NOT PART OF THE PLAN.

It turns out that each address led to a bakery store, where participants were instructed to pick up a cake for a Robin Banks - or Robbing Banks.  As each cake was obtained, the address cards on the site disappeared from the prize counter, although they can still be found on the site by moving the cursor around until a clickable link appears.

Written in icing on the cakes were phone numbers, and inside the cakes themselves were sealed plastic evidence bags containing a mobile phone, charger and a note that read:

Wow, you really took the cake! Now, put the icing on it: call [phone number] immediately from this phone and THIS PHONE ONLY. Do NOT give this phone number to anyone else.

Let's hope your fellow goons come through as well as you. Once all the layers are in place, you'll all get your just desserts. I'm a man of my word.

After calling the number, participants reportedly received text messages from the joker reading:

Good work, clown! Keep this phone charged and with you at all times. Don't call me. I will call you ... eventually.

Additionally, another page was discovered at http://www.whysoserious.com/steprightup/register.aspx, listing IMAX cinemas around the country and asking interested parties to register for free tickets for events on Thursday, December 6.

Could The Joker be planning to screen the IMAX scene shot for The Dark Knight? CBR News will have more on this story as it develops.

If you discover new Dark Knight clues, please report in with your news!

Now discuss this story in CBR's TV/Film forum.

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