Getting in under the wire before reaching the end of Avengers Vol. 1 was the release of the book's 400th issue, a last hurrah of Earth's Mightiest Heroes before the team becomes engulfed in the coming of Onslaught. (Perhaps the less said about Onslaught, the better.) Written by Mark Waid with art by Mike Wieringo and Tom Palmer, this mid-1996 tale's wraparound cover by Mike Deodato might give you the impression that you're in for another villains! villains! villains! anniversary issue--yet the story provides a clever twist which, as the Avengers series reaches its end, would fittingly bring the book and the team full circle.
On the streets of New York, the Avengers are facing the first foray of this new danger in the form of the original Masters of Evil; but to begin to understand the nature of it, we must return to Avengers Mansion where the residence/headquarters' butler, Jarvis, encounters a traveler who brings dire warnings from the future of not only the coming deaths of the Avengers, but also the end of the world.