It looks like Fox has had to push the Eragon trailer release date yet again, this time off of Superman Returns. Today, a reliable source close to the movie who wished to remain anonymous told us that Fox wants to move the trailer off of Superman Returns so that the special effects are further along when the trailer releases. Right now, the movie effects (Saphira, etc.) still have a long way to go. We have no information as to which movie they now anticipate the trailer will release on, but we’ll update you as soon as we hear something!