Bio and weapons

It has been 19 years since the demonic war, sealing hells forces temporarily, earths people then begun wondering, where is the doom slayer and what is he doing now, little did they know was that he was watching over them peacefully until something stopped the slayers break, forcing him to get back into the fight, these were some new foes but the slayer was soon to have a new team to work with.

(Disclaimer, I do not own doom or transformers prime and I also do not own any of the pictures of videos used in the story