Collects Avengers: The Ultron Imperative #1, Avengers (1998) #45-56, 1.5. Fan-favorite AVENGERS scribe Kurt Busiek's most epic tale concludes in this star-studded volume! When the time-traveling Kang the Conqueror launches an all-out war against the present day, the entire planet becomes a battlefield - and the Avengers are on the front line! Atlanteans, Deviants, Sentinels and even the Master of the World join the conflagration - but how will the Avengers react when Kang...wins?! Also featuring outer-space action with the 3-D Man! The spawn of Ultron! And an untold tale from the Avengers' past, as the original team takes on Dr. Doom!