Sharp-eyed CHUD reporter Devin Faraci found it in the preview he saw...
Some fans have been up in arms that Zack Snyder changed elements of the end of the story, specifically removing a giant alien squid from the climax (told you it was a spoiler if you hadn't read it). More reasonable fans understand that a giant alien squid wouldn't quite work in the movie.
But eagle eyed moviegoers will realize that Zack DID keep the squid. Just maybe not in the way you might expect.
In the film Adrian Veidt and Dr. Manhattan are working together on a project that will replicate Manhattan's energy, providing free and unlimited power to the world. That project? SQUID, the logo for which is briefly visible.
"I'm glad you caught that," Zack said when I complimented him on getting the squid in the movie. And what does SQUID stand for? "Sub Quantum Intrinsic Device."
As for how that SQUID plays into the larger film... You'll have to wait until March 6th to find out.