The Sons of Chaos and the Avengers
Percy and Nico were broken. They were betrayed and were killed by the ones they loved. Though their souls never went to Elysium. They were found by Chaos (who later adopted them) and were brought back to life to save earth once again from a new treat. Though this time it will be different, because this time there is a certain group of "Avengers" who are also facing this treat. But will the two heroes help save the earth once again, or will they let it burn?
Read and find out what will happen.
This will not be a Percabeth story, though there will be a few camp-halfblood characters. There will also be a Caleo and Loki will appear.
Rick Riordan ownes PJO and HoO, Marvel ownes the avengers