Transformers age of extinction

Once upon a time lived two transformers there names were Optimus prime and bumblebee they were best friends they would save the world with there other friends and will always try to stop megatron but he was impossible to beat him when they had there final battle Optimus prime killed both of his brothers Optimus prime killed megatron with a axe and sliced megatron's head off and then killed his other brother with a shotgun