In the aftermath of the enormous DC event Dark Nights: Death Metal, there is now an expanding omniverse and everything in DC comic book history is canon, opening up an entire new world of story opportunities. Crisis after Crisis has brought creators and readers alike to the precipice of what's possible & what's tolerable within these comic book pages.

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While some fans aren't too keen on retcons, others have seen it as an opportunity to modernize and freshen up these characters. Everything is canon again after Death Metal, with a few key takeaways sure to redefine the future of the DC multiverse.

10 Everyone Remembers Their Histories

Death of Supergirl Crisis on Infinite Earths

One of the most tragic consequences of Crisis on Infinite Earths was the death and then years-long erasure of Kara Zor-El, AKA Supergirl. In an immediate post-Crisis universe, Superman was meant to be the absolute last Kryptonian and it took decades for Kara to make her way back into continuity – and that was several crises later. What's important about Dark Nights: Death Metal is that everyone's memories from all continuities have returned and that all of these stories are alive again within the DC canon.

9 Convergence Helped Set Everything Up

Superboy takes on Kingdom Come Superman

A DC event that took place in 2015, Convergence answered the question of "what happened to all of the non-canonical universes, and what happens when we make them fight to the death?" Every time DC rebooted its continuity – be it Crisis On Infinite Earths, Zero Hour, or Flashpoint – a slice of that universe was preserved outside of time-and-space by Brainiac. By the end of the event, every single world and timeline that was retconned was fully restored, but until now, were outside of DC's continuity.

8 The Bat-Family And All Of Its Complexity

Batman Death Metal Loses Arm 1

Not only is every single one of Batman's origin stories canon again, like his father being the actual first Batman or Batman: Year One, but every storyline involving the Bat-Family is once again canon.

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While this is exciting due to Batman's rich history, it leaves much to be desired when considering how often Barbara Gordon's age has changed (she was first introduced as much older than Dick Grayson, and now the two are married) or that awkward time when Frank Miller re-wrote Robin's origin story.

7 Legion of Superheroes

Adventure Comics where Superboy meets Cosmic Boy, Lightning Boy, and Saturn Girl

In Doomsday Clock, the major DC event prior to Dark Nights: Death Metal, Superman doesn't remember Saturn Girl or the Legion of Superheroes from the 30th-century even though she remembers him and everything he had done to inspire the heroes of her time.

The reason for this was a retcon that eliminated Superman's (already retconned) time as Superboy, which was when he had met Saturn Girl. Dr. Manhattan \ changed all of this by completely restoring the previous timelines, while Death Metal took it further.

6 Superboy-Prime's Earth

Superboy-Prime picks up a car on his home planet

In the aftermath of Crisis on Infinite Earths, Superboy-Prime's Earth – where the DC universes are fictional – was completely destroyed and erased. This eventually led to Prime becoming one of the most devastatingly powerful and evil beings in DC, as he did anything to try and get his world back.

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In the Death Metal tie-in Secret Origins, Prime sacrifices himself as he attempts to destroy the Batman Who Laughs and is sent back to his home, which has been restored as if Crisis had never happened to Prime.

5 Justice Society Of America

On the very last page of the main Dark Nights: Heavy Metal series, readers see Sgt. Rock in the year 1943 as he's joined by the Justice Society of America, who premiered in print way back in 1940. While they played a significant role in Doomsday Clock and were restored within that story, their presence in this new omniverse of "everything is canon" is intriguing as there's no sign of Black Canary or Wonder Woman, who seem to have been replaced by Liberty Belle.

4 Crisis On Infinite Earths

Crisis On Infinite Earths

In perhaps the greatest comic book event of all time, Crisis On Infinite Earths changed everything. Not only did it kill off Barry Allen and help implement the One Kryptonian rule, but it completely destroyed the notion of a multiverse.

Once Convergence happened, the new retcon was that the multiverse erased by Crisis would be restored albeit not remembered. With these new changes after Dark Nights: Death Metal, these worlds would not only be remembered, but they would have a chance at total resurrection.

3 Wonder Woman's Wildest Of Origins

Wonder Woman Death Metal Disappears

Diana of Paradise Island. Diana of Themyscira. Wonder Woman. As the character who ultimately destroyed the Batman Who Laughs in the climax of Dark Nights: Death Metal, Wonder Woman has now become a Guardian of the Light, but not before remembering everything about her own history.

To say that Diana's continuity is confusing and convoluted is an understatement, as it's once again canon that she's powerless when bound by a man, that she was born of clay, and that her ability to fly varies drastically.

2 The Dead Will Rise

Hawgirl explains that people are returning from the dead to Wally

At the very end of issue #7 of the Death Metal series, Wally West is being shown what exactly happened since Wonder Woman defeated the Batman Who Laughs. Not only does everyone have their memories back from all of their previous continuities and histories, Hawkgirl mentions that folks who have been dead for a long time are returning as well. The implications from this are astounding, as it opens up a world of opportunity for characters to return. Maybe Captain Atom?

1 The Elseworld(s)

One of the biggest immediate mysteries that came out of Dark Nights: Death Metal's conclusion is this notion that Earth-0 is not the center of the multiverse. It's pretty wild news. Instead of Earth-0 being the nucleus, there are now two centers of this expanding omniverse.

One is still completely unknown, but the other is simply called "Elseworld", a title that carries a ton of baggage in the DC comic books as "Elseworlds" are the epitome of non-canonical DC stories. This is some HEAVY stuff.

NEXT: 10 Biggest Moments From Dark Nights: Death Metal