The destroyed world. A servamp fanfiction

What if the Eves were protectors of the peace and didn't know that vampires exist? What if the Servamps were the toughest group besides the Eves to exist in this destroyed world and C3 wants to destroy both sides. What if there is a ninth brother that only the Eves knew about and he liked it that way.
Until he met a hellhound named Cerberus and an angel named Athelia, becoming a part of their family and soon intermingles with the Servamps.
I don't own servamp or any of the characters except for Cerberus, Athelia, and Mikael. Has anyone thought of dc and servamp crossovers?