The Autobot's Doomslayer The Decepticon's Maurader

(Steve(Gravewalker):Seriously transformers and doom crossover deserves attetion)
After The Doomslayer known as Y/n killed the Icon of sin a second time the demons fled back to the underworld homeworld comonly known as hell and swore to NEVER again invade Earth and perish from starvation then be ripped and teared apart by the hellwalker but all victories come with a cost...Vega died again at Urdak homeworld of the Makyrs sacrificing himself in order to activate it's rifts but not all was lost his former betrayer Dr.Samuel Hayden now ally was still with him as his partner.After years pass and Earth slowly being restored until a certain alien cube crash landed on earth Y/n used a portal from his base known as the fortress of Doom.Y/n retrieves the cube wich unknown to him his action will draw the attention of certain autonomous robotic factions.