DXD: Kuuga's Revival

An ancient tomb uncovered, monsters are revived, but so is the hero that sealed them. The world has changed from what they've known, how will they cope? Will it take the hero becoming the Ultimate Darkness that the prophecy foretold would happen or shall the hero become the light to guide? Disclaimer: I do not own Highschool Dxd nor Kamen Rider Kuuga, which are owned by Kadokawo corporation and Toei Company. I also do not own the image.