It sounds like a good way to show two characters separated only by decisions. I could see a Murphy/Rudolph story fitting in this, where we see the differences between them highlighted by the similarities. Both could be trying to figure out their place in the post-Stab supernatural world.
One hung her hat on the outcast wizard that killed his master, and later withheld info that got her partner killed. One hung his hat on a supernatural nation seeking justice against the wizard that brought monsters into the man's life.
Then they both lose rhose they associated with, leaving them alone and powerless in a world tilting into darkness as the Fomor grow in power. When their paths cross, and both are forced to choose sides in a new conflict, will they find common ground, or will they once again mirror each other from opposite sides?