History Fridge / CrisisOnEarthX

** Its great possibility since White Canary was executed for being bisexual, but given Earth-X Felicity still lives despite the Holocaust never stopping in this world, the others may have survive unless until said/shown otherwise.

%%To avoid it in the future, let's not bring up the fact that people hate Nazis in this crossover as FridgeBrilliance. Especially on account of Administrivia/RuleOfCautiousEditingJudgement.

* When [[spoiler: Nora West-Allen, Barry's and Iris's daughter from the future,]] talks to Barry at the wedding, the Flash Leitmotif plays, hinting at their connection.

* J'onn J'onzz came to earth before World War II, so in Earth-X, he either escaped the white martians who killed most of his family only for his new home to be taken over by the white martians' earth equivalents, or he escaped the white martians only to be killed by Nazis. Or perhaps he fled the planet as soon as the Nazis took over. Or, if the point of divergence isn't the Nazis winning WW2, maybe he never survived at all.

** The last two times Kara has come to Oliver's universe Kara was 1) brainwashed by an alien and almost killed Oliver and 2) was trapped in her own mind by villain along with Barry it makes sense Oliver would want a plan to deal with her. As for where he got it, while J'onn got rid of the Kryptonite from the DEO, it is entirely possible Kara knew where to get some and convinced Clark to let her give a piece to Oliver just in case she is ever on another world where he or J'onn aren't there to save her. The Legends are another possibility as well.

*** That's exactly why Cisco would have done something like that. If not Kara, evil doppelgängers aren't something he's naive about considering he's fought one himself, and they'd dealt with Kara being brainwashed herself. Also, who said anything about kill? Oliver's first shot was to her shoulder, not her heart.

*** Everyone in the group seems to be both familiar with Krypton the planet and Kryptonite itself. Harry mentions there's 53 Kryptons (or was since many of them likely blew up like usual) like there's 53 Earths, and Felicity's reaction to seeing the kryptonite arrow is to ask if Oliver shot Kara suggesting she knows exactly what it is and what it does. They also seem to be aware of Superman, so clearly at some point they were filled in in the basics of how her universe operates. How exactly Oliver got it is a good question since he's never been to her Earth yet, but he clearly knows the gist of how Kryptonians work.

* While Kara is somewhat squicked about the idea that her doppleganger is married to Oliver-X, it makes perfect sense after the denouement of last year's crossover. Felicity mentions how much she and Kara look alike, "almost like looking in a mirror." Since Felicity is Jewish, Oliver-X would never consider her counterpart worthy, but since Kara-X is there, he has she would be his type.
* Winn-X seems on a very short fuse during his entire encounter with the heroes, adamant about destroying the gateway between Earths and nearly killing them all to keep his enemies away from his home. At first it seems puzzlesome even given it's his Earth-X doppleganger, but then I realized: on Earth-38, Winn and James are best friends. If there's anything of that relationship shared by their counterparts fighting the oppressive Nazi regime, then not only did the resistance lose one of its best champions, but Winn lost a friend. No wonder he's so pissed.

* Given the distinct lack of a significant amount of metahumans on Earth-X, perhaps that's the reason Leo shows contempt for Earth-1 Snart's planning advice. Leonard was just like Leo the type to plan everything down to the second, and it's heavily implied he was so good at it he was bored with conventional crime. However, once The Flash showed up Leonard starting failing and having to come up with things on the fly. Leo never had to deal with the unknowable factors that metahumans introduce coming into his plans before, so he never had to learn to IndyPloy his way to victory like Leonard did. Thus Leo can't conceive of his meticulous planning not working.

*** That's exactly why Cisco would have done something like that. If not Kara, Evil Dopplegangers aren't something he's naive about considering he's fought one himself, and they'd dealt with Kara being brainwashed herself. Also, who said anything about kill? Oliver's first shot was to her shoulder, not her heart.

* Earth-X Winn being the resistance leader makes more sense when one considers that his actor, Jeremy Jordan, is Jewish and Jews are the minority group that Nazis persecuted and marginalized the most.

* Earth-X is portrayed as having concentration camps with Jews in them in the present day. 60% of the Jewish population of Europe was killed in the Holocaust over the course of just four-to-five years. If that had continued unimpeded to the present day, all Jews except those who managed to hide by assuming non-Jewish identities would already be dead (or in Felicity's case, never born).

* When [[spoiler: Nora West-Allen, Barry's and Iris' daughter from the future,]] talks to Barry at the wedding, the Flash Leitmotif plays, hinting at their connection.

** Felicity/Kara: A blonde, bespectacled NiceGirl who work in a multimillion dollar company ''and'' a group of heroes who keep an eye on threats of their respective cities. They even wear similar clothes while on the job, and noted of their visual similarities in the previous crossover.

*** Everyone in the group seems to be both familiar with Krypton the planet and Kryptonite itself. Harry mentions there's 53 Kryptons (or was since many of them likely blew up like usual) like there's 53 Earth's, and Felicity's reaction to seeing the kryptonite arrow is to ask if Oliver shot Kara suggesting she knows exactly what it is and what it does. They also seem to be aware of Superman, so clearly at some point they were filled in in the basics of how her universe operates. How exactly Oliver got it is a good question since he's never been to her earth yet, but he clearly knows the gist of how Kryptonian's work.

* Earth-X is portrayed as having concentration camps with Jews in them in the present day. 60% of the Jewish population of Europe was killed in the Holocaust over the course of just four-to-five years. If that had continued unimpeded to the present day, all Jews except those who managed to hide by assuming non-Jewish identities would already be dead.

** Oliver probably realized how utterly, ''hilariously'' outgunned he was facing a Kryptonian. With Barry and other metahumans he's dealt with, he and the team could come up with some method of dealing with them, but Kara was completely beyond anything Earth-1 had to offer, with no known weaknesses except alien mind-control. If he figured out there was a possibility there was a Krypton in his universe and there was no way anyone would be able to deal with them, he could very well have asked had Cisco to do some research, and Cisco might have asked Gypsy and Harry if they knew anything about Kryptonians anywhere in the multiverse, which would have led to Kryptonite.