The countdown to Ultimatum begins here - and when it's over, the Ultimate Universe will never be the same! And when we say that in the Ultimate Universe, you know we ain't fooling around! A year later, who are the Ultimates? After going through the tumultuous events of the past two volumes, the Ultimates find themselves operating out of Tony Stark's mansion in New York where, no longer working for S.H.I.E.L.D., they have to make it on their own. But a terrible secret is about to tear them apart and bring about a murder at the mansion! One of Earth's greatest heroes will die, and there'll be plenty of suspects! New Members! New Adventures! And New Secrets! All this and Ultimate Venom, too!