After watching the new Trailer I'm pretty damn sure that Ratchet does in fact die, since he is only seen once in the trailer and the is immediately after Prime say "How many more of my kind must be sacrificed?" Am I the only one that thinks that it pretty much confirms that he is dead?

 

After being in 3 films, it's going to be kind of sad to see him go. I hope he pulls through.

 

Well if he does die Bay would be going into the G1 movie because Ratchet did die in that movie.