This bit of news comes from Latinoreview.com unfortunately Fox Studios is denying this bit of news so its officially unofficial.
"We are finally going to see the AVATAR trailer and it is in front of TRANSFORMERS 2. I have heard that from multiple sources and while it seems that TERMINATOR: SALVATION was in the running, TRANSFORMERS 2 won out."
"However, the AVATAR trailer in front of TRANSFORMERS 2 has been confirmed by these same sources - which kind of makes it all the more valid in my eyes."
Avatar is a 3D movie. Are we getting 3D glasses to check out the trailer in front of Transformers ROTF? Guess we will just have to wait and see. According to Cameron this is the technology of the future. Cameron has not touched other properties in the last 5 years or so because of his time he is devoting to this movie. Hopefully we will believe in Avatar as much as James does, when we finally see it.