What's up with the 'Justice League' post-trailer cliffhanger? Is that ... Superman?

The Justice League Comic-Con trailer makes a big deal out of uniting the DC superheroes. But it doesn't take a Batman-level intellect to figure out that one's still missing.
Superman's nowhere to be seen in the latest Justice League footage reel – and since Henry Cavill was also MIA at the Warner Bros. Hall H panel, no one got a chance to ask him about it. But that latest trailer may have given us a little clue as to how the Man of Steel will figure into all of this.
SEE ALSO: Watch Gal G