From what I can tell from the emails, the feature trailer for Transformers 2 will arrive on May 8th with Star Trek. When it comes to the teaser trailer, it has already been predicted that we can see it with another Paramount/DreamWorks title, Eagle Eye. Since D.J. Caruso's thriller is right around the bend, it won't be long before we figure out just how accurate these predictions are.
Transformers 2: Revenge of the Fallen opens to theaters on June 26th, 2009.