Transformers One Explains How the Autobots Turned Into Transformers
In Transformers One, we not only got to understand how Optimus Prime and Megatron rose to leadership among the Autobots and Decepticons respectively, but the prequel storyline also showed us the transformation of Orion Pax and D-16 from simple mining robots into fully-fledged Transformers. Their initial mission, which they undertook alongside future Autobots Elita-1 and Bumblebee, provided them with the necessary support to uncover the real truth about Cybertron. This revelation, concerning the Primes, Sentinel Prime, and a grim reality about their home planet, bestowed upon Orion and D-16 new abilities that ultimately altered the course of history forever.