The Superman actor had been rumoured to join director Zack Snyder in Hall H on Saturday, July 14.
Sources have told The Hollywood Reporter that Cavill will be present for the first look at Man of Steel. However, no further cast members are expected to attend.
Man of Steel's ensemble cast includes Amy Adams as Lois Lane, Kevin Costner and Diane Lane as Superman's adoptive parents Jonathan and Martha Kent, Russell Crowe as the Caped Crusader's biological father Jor-El and Laurence Fishburne as Daily Planet editor Perry White.
Michael Shannon will play the villainous General Zod, while Jadin Gould, Richard Schiff, Dylan Sprayberry and Christopher Meloni will also appear in the movie.
Man of Steel is due to be released in cinemas on June 14, 2013.