It's an unfortunately expected bummer.
Fire Emblem: Awakening is going to be released during 2013 in North America and Europe, as reported during the recent Nintendo Direct presentations.
Although the existance of DLC has been confirmed, it should be noted that the presentation made no note of the "Awakening" subtitle, instead just listing "Fire Emblem" by itself over a black screen.
A more specific release date has not been revealed yet.