Marcus is totes gonna do that. Just watch as, in a last ditch effort to help him escape, the sniper shoots him in the chest, Marcus has a near-death experience, connects with some badass like Sutr or Vishnu, and then just murks the fuck out of everything.
Right....what if, then, a Spirit that shares similar abilities to another Spirit pretends to be said Spirit? Say, Merlin and Morgan La Fay or whatevar.