An ACTS OF VENGEANCE tie-in! The Energy Avenger against Venom! Klaw! The Living Laser! The Red Ghost! And when the battle takes him to the Watcher's house, a certain omniscient man on the moon is not what you call pleased.
This issue notably features an "almost imperceptible" crossover with What If? #9. The X-Men battling Krakoa from that issue make a cameo.