After hearing a few other fans' ideas for possible plots for Transformers 3, I decided to throw one of my own ideas out there to let it be heard. And rather than write it out in formal script-form, I'll just pitch the general points. Here ya go. After Transformers 2: Revenge of the Fallen, the first thing to consider is how the world would logically be dealing with the realization that aliens not only exist, but have been present on earth in secret and have even attempted to destroy them. The governent would most likely take steps to cover it up in the interest of peace, by playing the broadcast and public Decepticon sightings off as a hoax (a longshot that very few believe completely). A new sense of mistrust has begun to grow with foreshadowed disastrous implications. But the center of the story would revolve around the Megatron, the Decepticons, and their newfound determination to simply wipe out the Earth (including the Autobots). After the destruction of the Fallen and the Sun-eater machine, Megatron believes the future of Cybertron to be condemned, and all his actions and plans are executed in the name of Cybertron. Sam and Mikaela are engaged and continue trying (and failing) to lead normal lives. The Autobots and N.E.S.T. team continue hunting down remaining Decepticons on Earth who've scattered after Megatron's temporary disappearance. Meanwhile, Megatron and Starscream retrieve the Fallen's spark and use it bring life to their "Hatchling" army. These creatures are more or less mindless, and have the ability to transform into anything (living or machine) and can even combine like water droplets to form larger autonomous robotic organisms. The final stroke of Megatron's plan is revealed. Secretly invading by force, and infilatrating world communications via Soundwave, he overwhelms and manages to convince a few hostile nations around the world to prepare for secret Nuclear strikes on the world's larger World Powers, convincing them that America plans on using the Autobots as a secret weapon for World Domination. Miltary and political protocols are pushed aside as more mistrust bleeds quickly through the worldwide grapevine, ridden heavily with plenty of Bay-born explosions, and quickly reaching a breaking point that could mean death on a catostrophic scale. All the while, Megatron's hatchling army, supervised by teams of other symbiant Decepticons, oversee the underground nuclear preparations. America and the Autobots become aware of the situation. The Autobots (now a bit stronger in numbers with the arrival of a few other familiar faces), contemplate annihlating the smaller hostile nations in the interest of the greater good. Optimus considers with a heavy heart what such thoughts did to their homeworld, and convinces his team that repeating their mistakes on earth would be exponentially more immoral. When the Autobots fail to convince the US to pull back their preemptive offense, the Autobots make a final stand and challenge Megatron and the Decepticons to a final battle on Mars, where no more human life will be lost. Megatron agrees, deciectfully leaving a secret band of Decepticons on earth to continue their plans, giving Lennox, Epps, and the world's armies something to deal with. On Mars, the Autobots revert back to their space-travel protoforms and enagage in heavy, all-out, acrobatic combat, with gravity-defying moves and heavy emotional scene language. At last, Optimus Prime, completely overcome with frustration, manages to best Megatron in battle, imploding his chest with a blast or punch, and breaking him halfway over a jagged piece of Mars landscape. Without leadership, the Decepticons are driven off the planet and out into space. Returning to earth, the Autobots discover that mankind managed to unify briefly enough to manage a counter-attack and defeat the remaining Decepticons, without Autobot aid. Optimus delivers a heavy, meaningful omnipotent monologue. Cue badass Linkin Park song. What do you think?