Marvel Comics released an ominous teaser image signaling a new incarnation of Heroes Reborn.
The image features the words "Heroes Reborn" in bold white letters on an orange gradient background. Beneath the title reads, "whatever happened to Earth's Mightiest Heroes?" and the year 2021.
Heroes Reborn was a massive crossover published between 1996-1997 with titles featuring such Marvel mainstays as the Avengers, the Fantastic Four, Doctor Doom and The Hulk. Marvel famously outsourced the event to Jim Lee's WildStorm Studios and Rob Liefeld's Extreme Studios after the two former employees left the company to found Image Comics. During Heroes Reborn, Marvel relaunched Fantastic Four, Avengers, Iron Man and Captain America with new #1 issues, and Thor was retitled Journey Into Mystery.
As for the story itself, Heroes Reborn began with the Avengers, the Fantastic Four and Doctor Doom being reborn after seemingly dying while fighting Onslaught. In reality, though, they were transported to a pocket universe by Franklin Richards.
While sales during Heroes Reborn were largely favorable, the event proved controversial among fans due to the changes made to certain characters in relation to Marvel's sliding timeline.
Source: Marvel