A slew of teasers sent out by Marvel Comics proclaim “Marvel History Is Destroyed” with the date March 2019 at the bottom. The subject line of the email from Marvel PR said “The Marvel Universe Is Destroyed!”
Each teaser features a different superhero comic series and implies that a mystery character played a key role in its history. For example, the Amazing Spider-Man teaser asks “Who brought Spider-Man back after ‘Spider-Man: No More’?” while the Fantastic Four teaser asks “Who really gave the Fantastic Four their powers?”
Check them all out here:
The word “who” in all of the teasers is given a fiery yellow and orange stylization, which may be a hint towards the identity of the character (or group of characters). The Phoenix Force? Dormammu? The Spirit of Vengeance? The list of powerful flaming Marvel characters is pretty long, so it could be anyone.