we've got the allspark plot in the first one,but no one talk about: where is the matrix of leadership? and i'm starting to think that the second film will be about the matrix and how the decepticons will need it to bring back megatron from the abyss.and after that,why not the dinobots as an elite team to bring it on earth for optimus?and the constructicons trying to stole it?into the ark?a nemesis-ark space battle at the beginning of the film?full of new transformers in each vessel? and after that if bay though of 3-4-5 movie why not the number 3 to be about a kind of war like u.s-iraqi oil war but with energon?
Unicron would be awesome, but with hoe Fantastic Four 2 used Galactus, I doubt theyd do Unicron so soon.