From what we saw in TF4, All Autobots, Hound, Crosshairs, Drift, Optimus and Bumblebee united in the desert. They claimed there were no more Autobots besides them. So if there is going to be a TF5, do you think they will just stick with the 5 Autobots (4 if Optimus permanently leaves), or do you think there will be more Autobots to come? They could arrive to earth or some were hiding and did not dare show their faces. I just hope there are more Autobots, specifically Prowl.