The reason Superboy Prime was a footnote in the Superman Museum was because he matured and became Superman.After the events of Blackest Night, Superboy-Prime realizes his crimes and sets about becoming The Atoner. His new hero career follows something along the lines of the Secret Identity story and he manages to become the Earth's greatest hero. However, he is still all too aware of his sordid past and continues to be wracked with guilt throughout the years, making him more of careful and self-effacing of a Superman than his counterparts. When the government builds him the museum, they try to cover up his past crimes, thinking it would negatively impact the people's trust in Superman and the government that supports him. However, Superman insists that they include his past history in there, as both a reminder to himself and the populace that he is but a mortal with the same flaws as everyone else, as well as that he has done horrible things and is only now making for them. He sees it as a way to keep himself from getting out of hand again, as well as a way to remember all those who he harmed. The government reaches a compromise by putting the section about Superboy in the museum, but only as a footnote. In the far future, the facts have become a little scrambled from multiple retellings. As a result, Superman Prime is remembered both as the universe's greatest hero, and the unspeakable evil that inspired the Legion of Supervillains. As a result, he inspires both the Legion of Super-Heroes and the Legion of Supervillains, both groups looking at separate points of his history. The arrival of Superboy in the Superman museum of Earth-Prime is part of a Stable Timeloop that ensured this history.
Alternatively, Superboy Prime became every version of Superman ever.Following the above, despite becoming The Atoner and a hero to Earth-Prime, Superman Prime felt that he still hasn't made up for his crimes. As he's practically immortal, he became a heroic version of the Time Trapper. Once gaining these powers, he used it to access every timeline. He uses his powers to reincarnate as all versions of Superman. In every version, his drive for redemption is manifested in their status as The Cape, though the original personality remains as a secret, split version. Legion of 3 Worlds was a Batman Gambit to get his young self back to Earth-Prime, where he could have his Heel Realization.
The Linda Danvers Supergirl is really the Supergirl of Earth-Prime integrated into the Post-Crisis ContinuityLinda was born on Earth Prime as the daughter of Fred Danvers and Sylvia Kent Danvers, the sister of Earth-Prime Clark Kentís father Jerry Kent. As a result, she is technically Clarkís cousin. She was born with a metagene which would have given her fire angel powers that would allow her to fight alongside her cousin Superman as Supergirl. This explains why she had a similar name to Earth-1 Kara and why she was able to substitute for Silver Age Kara for some time. Sometime before the the Crisis on Infinite Earths, she and her parents were plucked from their native Earth and set on Earth-1 for some reason. At the time of the Crisis, Linda was too young to fight against the Anti-Monitorís minions and therefore did not appear in the story. After the Crisis ended, Linda and her parents became continuity refugees like Power Girl and were integrated into the Post-Crisis continuity. However, since she was still destined to become a Supergirl, Matrix fused with her to awaken her fire angel powers. Perhaps part of the reason the fusion was achieved was because they were different versions of Supergirl and thus could potentially fold into one being when given the means via Matrix's shapeshifting powers. Now that Earth Prime has been restored, Linda will be rescued from Hell and find out why she and Power Girl were allowed to integrate individually alongside the native Supergirl as part of some convoluted plan before heading back to her native continuity and dealing with her cousin Clark as well as Earth-Prime version of Earth-0 heroes.
The new Aquaman, Arthur Joseph Curry, is actually a time traveling version of Orin's son, Arthur Jr.Sometime in the future, Arthur Jr. is resurrected. However, something happens to catapult him through time, leaving him to be found by Phillip Curry. Devastated by the death of his wife and premature son, Phillip adopts Arthurs as his own child. A little bit insane with grief, Phillip convinces both himself and Arthur that he is Arthur's real father, and Arthur is the boy that Elaine died giving birth to. As Arthur grows, Phillip also makes up the "mutagen" story as an explanation to Arthur's abilities. However, Phillip does allow Arthur to keep the one thing that the boy still remembers about his previous life: his name. Arthur grows up unaware of his true heritage, but still resembling his birth father. The Lady of the Lake's tale of his origins was also a lie, since something in the future depends on Arthur not knowing his true origin.
Death Is Cheap because Death of the Endless is too nice for her own good
Alternately, it could be several of The Endless indulging in sibling rivalry or appointing agents to enact their private agendas.
Alan Moore is God.Have you seen the DCU's Abrahamic God? It's clearly Alan Moore, much in the same way the God of 616 is Jack Kirby.
Deadshot is HIV positive.It was really weird that they would point out how he was smoking blood covered cigarettes. And it would put his whole "not giving a damn about living or dying" thing into perspective.
Superboy-Prime is going to discover TV Tropes.If Earth-Prime is essentially our Earth, then there is likely an iteration of this site there that he can access. Which will in turn cause him to have No Fourth Wall, granting him all the Genre Savvy he'll ever need to finally win. Think about it, if he can punch reality to effect a Cosmic Retcon, then maybe the fact that DCU keeps getting worse is a calculated effort on his part to produce a reality dark and cynical enough to allow a villain, which is what he's self-aware to know he is now, victory.
All those beings who alter reality are really storytellers, and The Multiverse is simply different people's attempts to tell the same stories.Both "Legends of the Dark Knight" from Batman: The Animated Series and Whatever Happened To The Caped Crusader? use the storyteller device to tell completely different stories about Batman...Perhaps what "really" happened has yet to be told...
Rex the Wonder Dog is the second coming of JesusPraise be unto Rex!
Krypton was the "human life" created by Doctor ManhattanDeciding not to even bother with his own universe anymore, Doctor M. decides to use a relatively quiet little reality for his experiments. Naturally, given his entirely rotten luck, the planet goes boom, and, in a last-ditch effort to save his creation, he loads the dice and sends baby Kal-El's spaceship to Earth, the only planet he knows he'll be safe. The rest is history.
Captain Marvel doesn't really have the powers of seven gods— Shazam just told him that to channel his powers in certain directions.Come on, the first letters of all the beings' names (in English) just happen to spell the name of the millenia-old wizard (in English) when both the heroes named and said wizard lived and died long before English existed? No, it's more likely that CM's powers are far broader than what's shown, but Shazam told a little white lie to narrow down their focus and make him think he was more limited than he truly is; especially telling Billy that his powers included "the Wisdom of Solomon" specifically to give him that wisdom, or make him think he had it — thus making CM too wise to repeat the mistakes of Black Adam. Evidence? In The Golden Age of Comic Books, Captain Marvel was not just a Flying Brick, but often had New Powers as the Plot Demands, such as super-hypnosis— powers which often made only a single or a handful of appearances, as he literally forgot he had them (wisdom does not equal good memory). And good ol' Shazam was always there to reinforce (perhaps with a touch of Laser-Guided Amnesia?) the idea that he had "only" the powers of Zeus, Mercury et al, defined as strength, speed, stamina, flight, invulnerability and wisdom.
Humans were alone in the universe on Earth-8The White Entity from which all life is said to spring is both a post-crisis character, and said to originate on Earth, something patently impossible given that Oans (from Earth-1) predate Earth's formation. We also know that all post-crisis characters were originally from Earth-8. Obviously, Earth 8 only had humans, which explains the claim (he created all life in the universe in that world because all life in that universe was on Earth); because The Entity was discorporate when the universes melded, although his role as the Creator was expanded to the universe as a whole, his memories backstory of being on Earth at the time remained unaltered (we have seen characters in the afterlife to have had unaltered memories between the Crisises). Thus, what appears to be a timeline discrepancy is actually just Powergirl Memory Syndrome.
Civilians come back from the dead almost as often as superheroes do on Earth-0Their revivals are simply not documented in the comics, as they aren't part of interesting storylines.
Crisis on Infinite Earths didn't destroy all the alternate Earths, just separated Earth from the Marvel Multiverse by a long shot.Marvel's Earth is called Earth-616, and DC and Marvel and a few crossovers. Not only that, the Almagam Universe is canon in Marvel. The last few Crisis crossovers in the DC universe have been about establishing that connection again, not recreating the multiverse.
The Spectre's power level varies at God's whimWhich is why it varies such an incredible range. God either nerfs or twinks him out depending on the situation and how much of the situation He's willing to do semi-personally via His Spirit of Vengeance, and how much of the situation he wants His Creation to solve on its own, possibly via application of divine Power Limiters.
Miss Martian is secretly Martian Manhunter in dragBack in JLA #27, Bruce Wayne is meeting with Clark Kent in Japan, and Clark introduces him to a young Japanese woman named Hino Rei. Bruce immediately recognizes "her" as the Martian Manhunter. Apparently J'onn J'onzz likes to cosplay as Sailor Mars. Skip ahead some years later, where a new Martian character, Miss Martian, shows up out of nowhere to join the Teen Titans. Miss Martian likes to dress like a Sailor Senshi. Hmmm...
Mr. Mxyzptlk never really lost his powers during the Emperor Joker storylineMr. Mxyzptlk and Bat-Mite are shown as the most powerful beings in the universe. During the World's Funniest one-shot, they destroy multiple universes, including defeating the Specter a number of times as a running joke. Mr. Mxyzptlk gave Joker some of his powers just to get a good story because Mr. Mxyzptlk is bored (which, incidentally, is why he chases after Bat-Mite in World's Funniest). He didn't know whether Superman would defeat the Joker (because he didn't want spoilers), but even if Superman couldn't, Mr. Mxyzptlk would just put everything right again.
God in the DCU comes from the 5th dimension.Mxyptlk is capable of deeds like easily overpowering the Spectre, despite the Spectre being the embodiment of God's wrath. The reason why he can do these things is because his power level is the same as God's. The truth is that God comes from the 5th dimension, and is the same species of Mxy. They may even know each other-God lets Mxy mess around because they're good friends. Closely related, whenever you see the fifth-dimensional imp or Batman's biggest fan seem like they lose, it's just because it's more interesting for them that way.
Mephisto is behind the upcoming DC Universe reboot.Undoing Spider-man's marriage was only a 'test run' on his grander plans for both the Marvel and DC Universes. His plan is to apparently revert the DC Universe to decrease the amount of superheroes and make it easier for him to take it over (covertly, of course). The other consequences (and that for the Marvel 'verse) are yet to be seen.
Post-Flashpoint continuity changes.
At least one of the Earth Born Angels will join Justice League Dark.
The DC Universe is intent on integrating all other fictional universes.
Firebrand from "Battle For Bludhaven" and the revitalized Freedom Fighters was a poorly done Take That at Marvel's Ultimate LineNotice how he is a Legacy Character done by a "Edgy" redesign. He is an asshole with a political bent like Ultimate Captain America. His costume, inconsistantly drawn in his debut appearance, is very modern looking and simple (edging on generic). Maybe someone else came up with the idea and Justin Grey and Jimmy Palmiotti took it and half baked it.
The DCU is not only sentient, but manipulating the recent crisis.Specifically, it wanted to simplify itself by undoing all the damage Krona did. It already used the events of Zero Hour to help simplify the remains of Crisis on Infinite Earths, but the new multiverse got the DCU mad. Flashpoint was an attempt at trying to get back to its original state by assimilating some of the other universes(Wildstorm, Vertigo...) and getting retroactively rid of stragglers from previous crises like Pre-Crisis Power Girl. Its also been working hard on getting rid of any information about previous incarnations of itself, and its been doing this with editing the its most powerful denizens(hence why the Phantom Stranger got a single origin-the universe doesn't trust him with a Multiple Choice Past). It used Barry Allen because he kept showing up in crises.
Pre-Flashpoint Duela Dent was the Earth-3 counterpart of AnarkyProbably not true, but I'm just throwing it out there.