Here is what Michael told EW...
What can you tell us about Transformers 2? Or, better yet, what will you tell us?
MICHAEL BAY: When we were writing the script, I said to the writers, "I hate sequels that try to make it to the third movie. Pretend like we’re never having a third movie, so let’s go for broke on the second one. I hate those cliffhangers! Let’s just make this movie stand on its own." I really feel this movie is not a forced sequel. I think the script is really good, and I think it’s got a lot of new stuff in it. There are a lot of rumors out there, but we’ve released a lot of fake stuff. We’ve done a really good job of keeping things secret.
Can you give us a hint of something that is true then?
MB:[Laughs] No.
C'mon, anything?
MB: There are some great, new robots that are really inventive.
Hmmmm, inventive you say? Like this corvette that appeared on the set? Probably a hot NEW autobot maybe?