No, not Alternators. Something different. Cars would be Legends sized, whatever scale that is. Then tanks, jets and other vehicles would be scaled accordingly. It would have to be a new series with new characters. Leaders are expected to have large toys so they would have to have an appropriate alternate mode. The whole series would be based around this size scale. There would not be characters in multiple size classes as we get currently. Unless a character gets a change in alternate mode. There would be some Cybertronian alternate modes however since these can be any size. A Cybertronian Deluxe car would still be in scale with a Legends earth car. The Cybertronian would tower over the Earth car when in robot mode so characters chosen would have to be appropriate for the size class. Cybertronian flying machines at a Legends size class would be really tiny in robot mode if they were in real life despite their alien futuristic appearance.