It can be old or new concepts. For me, I would like to put an emphasis on the Autbots being robots in disguise while the Decepticons strive on making sure human are aware of giant robot in their midst. Another concept would be having a down-to-earth Optimus who has flaws here and there. If Optimus has to be head honcho, have another younger Autobot (not Bumblebee) lead the main team. Speaking of the team, I hope each side has at least 8 characters on both sides.