Citing ILM (effects house Industrial Light & Magic) as a reason, producer Frank Marshall posted on his Twitter account that the new trailer for The Last Airbender will be delayed until February, 2010.
Not enough ILM shots finished, so LAST AIRBENDER trailer will not debut until Feb…
In August, Marshall revealed that the trailer was expected to be released this Christmas. The Last Airbender is scheduled to hit theaters on July 2, 2010.
Source: Frank Marshall