SM3 drops are not gonna happen IMO.
SM3 completely alienated it's core group of fans by catering to the kiddies and the girlies by becoming the kiddie/girly chick flick that it was. Transformer 2 however (as bad as I thought it was) delivers everything that the its core group of fans expected: CGI, "jokes", Shia, Optimus, fights, explosions, and of course pedophilistic upskirt (or in one case upshort) shots of smoking hot girls..
So I don't see TF2 disapointing its fans like SM3 did and thus I don't expect big drops from this one. In fact I fully expect it to make $450+ million and maybe more. It's an inconvenient truth, I know.