LOS ANGELES — Marvel Comics is planning a massive, publishing line-wide reboot this fall that will see all of its comic books revert back to No. 1s, introduce all-new superheroes and significantly alter others, including a new Spider-Man, a new Hulk and new team-ups never before imagined at the House of Ideas.

Dubbed "All-New, All-Different Marvel," the reset takes place after "Secret Wars," the ongoing summer event that will conclude an ambitious arc loosely going back to 2012 with the introduction of the highly popular "Avengers vs. X-Men" series.

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"We've been planning it for years," Marvel Editor-in-Chief Axel Alonso told Mashable. "We realized that ['Secret Wars'] would be a game-changing moment that would allow us to create a big white canvas. It’s an unprecedented chance for us to tell new stories across all titles with new No. 1s."

All New, All Different: Marvel is rebooting. Image: Marvel Publishing

Though the initiative is sweeping and comprehensive — with all-new creative teams behind both new and existing titles — it won't do anything to erase or rewrite history that previous comics have established. However, "All-New, All-Different" will pick up some eight months after the conclusion of "Secret Wars," and much will have happened in that time to alter the landscape.

Alonso said it's a perfect jumping-on point for new readers, but true believers will certainly recognize the Marvel world they've come to know over the years.

"There’s no red sky, there’s no icecaps," he said "But there will be new places on the map, there will be new characters that were just too cool to not bring back from 'Secret Wars.' There are new teams that are necessary to deal with new threats."

The new books — about 55 to 60 in all, slightly less than Marvel publishes right now — will each introduce new storylines. In some cases, a new character will be wearing familiar costumes, or will have moved, or will have significant shifts in their relationships to other characters. Many of those changes will be shockingly big.

"We chose all of our creators to come in with a hook — a big thing has happened that changes the status quo of the character," Alonso said. Those kinds of changes will be very much along the lines of the female Thor (who turned out to be Jane Foster) and black Captain America (Sam Wilson, the erstwhile Falcon).

Though he wouldn't say for sure, Alonso hinted that those two characters would remain in their current form. "These changes were not short-term," he said. "We’re deeply invested in those characters."

Yes, Thor, we do. Image: Marvel Comics

He did, however, reveal some big changes that may rattle a few traditionalists: "The all-new Hulk ... this character is certain to cause debate," he said. "The same people who went crazy with female Thor will have a field day with this one."

There's also an entirely new Spider-Man. Alonso wouldn't say much more, but hinted that there may be more than one (and the image above would certainly confirm that).

"Will there be enough room for him and Peter Parker? Read and find out," Alonso said, adding: "Wolverine will return to the Marvel Universe (again, this will be something big). Who is Wolverine? You’ll have to read and find out."

There will also be all-new, whole-cloth characters who will get their debuts in "core titles," Alonso said.

New No. 1s will be staggered throughout the fall, over a period of three to four months.

As far as the name "All-New, All Different," that's just a moniker for the initiative, Alonso said — unlike the previous "Marvel Now" initiative, if you pick up a new book, it'll be a simple Marvel logo with no cover blast.

But before we get there, there is "Secret Wars" to get through.

"You might say that ['Secret Wars'] ends a chapter in Marvel Publishing," he said.