Because TF4 is getting a new cast I'm doubtful that Ratchet will return. I'm holding onto the opinion that we only have Optimus and Bumblebee because they are the two star Autobots and even Bumblebee might have less of a role because he's an older car (which might signify some sort of retirement). Therefore, because we're having a new cast I think it's logical that the white ambulance might be Red Alert. Who do you guys want? Or do you think the ambulance could be someone else?