I'm imagining an epic Lord of the Rings: The Fellowship of the Ring style opening, probably Optimus narrating: At the dawn of time, as life began to flourish and exist, there was one being who found all of existence a stain.... this being was the Dark God, Unicron and he sought to destroy everything... planets were reduced to rubble, but Primus took arms against his evil brother. (We see Primus and Unicron battling) For eons, Primus and Unicron battled. The balance of power shifting between them more times than could be counted, eventually Primus created the Thirteen Primes to fight in his stead. Prima Vector Prime Alpha Trion Solus Prime Alchemist Prime Nexus Prime Amalgamous Prime Quintus Prime Liege Maximo Megatronus Prime And the Thirteenth Prime whose name has been lost to history These thirteen took up arms against Unicron (We see the Thirteen battle Unicron, Unicron even biting down on Prima) It was in this moment when all hope had faded that the Thirteenth Prime made one last stand.. (The Thirteenth Prime exposes his spark to Unicron which knocks him offline) Unicron was defeated... Primus became one with the planet Cybertron... eventually giving rise to the Transformer race, the Thirteen are gone, what became of them has become legend, legends become myths and old habits die hard.. as peace is hard to maintain... (Optimus Prime and the Autobots fighting Megatron and the Decepticons) I do not know what became of Unicron. If he is still out there in the cosmos, I fear for the universe's survival. We see Unicron in planet mode.... Unicron: That which does not become part of me shall become one with the void.... Maybe not exactly this, but I think it would be pretty epic to see realized since we've never seen it outside of comics.