Just not a fan of destroy the Earth plot in films because you know there is zero chance now that the villain has even the remotest chance of a win. Once they revealed that Ultron's goal in Avengers 2 was a mass extinction event it felt like the tension was gone from the film because he had already lost. I think we need a bad bot plot the Decepticons would have a chance at because success would not mean the end of the film franchise. Sure logically we know the good guys are going to win because that's just how the film industry works when it comes to huge budgets. But it seems like films can hold the tension longer when a bad guy win would still be something the heroes can come back from. At least with that a tiny part of your logic can say well what if they pulled an Empire Strikes Back?