Ms. Marvel, Vol. 2

Agent Sum has mobilized Operation Lightning Storm to bring in the fake Ms. Marvel, only it's the real one he faces. With considerable difficulty, she fends them off long enough for the fake to show up. They fight each other at length, and are both eventually captured by S.H.I.E.L.D. Realizing that there are actually two Skrulls involved, one masquerading as Agent Sum, Ms. Marvel confronts them and gets the battle going. Eventually, the fake Ms. Marvel reveals that William is actually alive, and offers information about him in exchange for freedom.