Original release date

Was this film originally supposed to be released in 2006? I remember seeing previews for the film in Fall 2006. I also noticed a lot of references to Superman Returns throughout the film and that movie was way more popular in 2006 than 2007. The original trailers also made the film out to be more adult than it actually is, more in the lines of Elf or Bad Santa. This all leads me to believe that the release date was pushed back from 2006 to 2007 in order to make the film more kid friendly. Is there any truth to this?