Transformers rise of the beast (OC Autobot)

(Warning: this contains spoilers to the new movie, if you haven't seen the movie yet, please Go watch the movie but if you have seen it, enjoy)

During the war of cybertron, Optimus and his Lieutenant Hijack orders a evacuation on the planet and sends Bumblebee and his brother Spark to earth and built a base for the coming autobot's, (after the events of bumblebee) few years later the autobot's are stranded on earth and wants to leave but soon they soon see an powerful energy source from the sky and finds a new way back to cybetron so did a new enemy known as terrrocons, the servants of unicron, now they must stop them from destroying the earth with the help of the Maximals.