Transformers 2?

As you know, Transformers was my favorite movie of the year and a sequel could only get better. Micheal Bay (Director of Transformers) has announced that the Dinobots will be part of the sequel. In case you don't know what those are I'll tell you. The dinobots are a group of autbots the transform into dinosaurs. They were created by Ratchet on earth, and are bigger than the average autobot. The second transformer that Bay announced was Soundwave. Soundwave is a classic Transformer, and an original Decepticon, he generally transformers into a boom box, and can release smaller decepticons from his chest. All we know about the plot is that Starsceam returned to Cyberton and is creating a new group of Decepticons with him as the leader. And somehow Megatron comes back to life. I have two theories about this. The first is one similar to the classic transformers and that is that the giant planet eating transformers Unicron brings him back to life, just like in the 1980's animated movie. The second is a cheaper way to bring megatron back to life. In this theory one of the surviving decepticons on earth (Barricade or squorpinok) sacrifice their spark to megatron and bring him back to life.