i think there is a possible plot for tf4 IMO The autobot's last stand is yet to come. just after optimus took the spark out of sentinel in tf3, it awakened the most dangerous decepticon, galvatron. sentinel's death served as the key to awakening galvatron (ala the omega key awakening omega supreme in TF:WFC). GAlvatron then awakened his OWN army of decepticons sleepinng in cybertrons depths with his second in command cyclonus. Then, galvatron wanted to conquer the universe but he must first destroy every remaining autobot, especially optimus and his crew in earth. In order to do so they befriend a human boy named Daniel who is a close relative to Sam. Daniel, wanting to be somekind of a "hero" like his cousin, helped galvatron and his crew pretending they were autobots. Daniel then served as a spy to the decepticons over the autobots until the decepticons reveal themselves to the autobots. Then a huge battle begins. The autobots suffering heavy damages was allowed to flee by the decepticons because they wanted to them to be very much ready for their second face off so the decepticons can destroy them with "honor". Daniel reliazing his mistakes joined the autobots. he then handed them a special device that the decepticons had given him to call them when he got a information regarding the autobots. Ratchet then reconfigured it with the help of Brains (who survived the decepticon ship crash in tf3 with wheelie) to summon the remaining autobots who are taking refuge among the stars. Then they were able to summon Ultra Magnus, Hot Rod, and a bunch of other autobots to help them in their final fight. Then when the autobots are preparing for the battle, a decepticon messenger approached them to give the conditions or agreement or whatever about the battle. The conditions is that optimus must choose his best warriors to battle galvatron and his best soldiers in an inhabited island on earth while the remaining autobots and decepticons will all duke it out on the moon (it is because the decepticons wanted to preserve earth tech since they really wanted to use its potential). Then the battle began and the autobots won the final battle with the decepticons ultimately destroyed. And then they lived happy ever after. that's just my own plot hehehehe. i wanted to know how you feel.