- Better Than Canon: A universe where Kara Zor-El has to keep living and having exciting adventures instead of getting fridged and then forgotten by all of her beloved ones? It certainly is.
- Crack Pairing: Pre-Crisis Supergirl and Dev-Em. A character whom Kara never met in canon and whose number of Pre-Crisis appearances can be counted on the fingers of one hand.
- Fan-Preferred Couple: A large number of readers would rather see Kara Zor-El hooking up again with her traditional Love Interest Brainiac 5 than with Dev-Em, a character who made few appearances prior to the Crisis on Infinite Earths and is rather impopular among Legion of Super-Heroes fans.
- "Funny Aneurysm" Moment: Linda Danvers and her adoptive parents attend Clark and Lois' wedding. Fred Danvers is aware that many super-heroes are attending and jokes about figuring out their secret identities. Linda warns him about Green Lantern mind-wiping whoever gets too nosy. The whole sequence is treated as a funny moment, written four years prior to Identity Crisis.
- Heartwarming in Hindsight:
- This timeline was born when an entity -Dream of the Endless- sent out an alternate Supergirl to help abort the Crisis on Infinite Earths. Flash-forward fourteen years and the same thing happens in Convergence.
- Bruce and Selina having their wedding one week after Clark and Lois is more heartwarming after their double date in DC Rebirth Batman's 2017 book.
- Hilarious in Hindsight:
- Kara Zor-El and Dev-Em become lovers. Flash-forward several years and Dev-Em is one of her enemies in the main universe and the DCEU.
- An alternate universe Saturn Girl is brunette, right like Supergirl (2015)'s Imra Ardeen.
- Kara having a Legionnaire lover who wants her to move to the 31st century with him, several years before the Justice League Unlimited episode where Kara fell in love with Brainiac 5 and moved to the Legion of Super-Heroes future.
- Satan Girl planning to force entire worlds to worship her like a goddess several years before Supergirl's Sterling Gates' run reimagined the character like a death and love alien goddess.
- A Kryptonian doppelganger of a hero of the House of El plus Mordru plus the Legion of Super-Villains come together to destroy the Legion? And the Supergirl of Earth-One gets to do some fighting? It kind of sounds like Final Crisis: Legion of Three Worlds which came out nine years later, isn't it? Compounded by the fact Darkseid was the next Big Bad.
- Kara isn't sure what she wants to join the League. A few years later, Supergirl would join the Justice League in the comics.
- No Yay: Satan Girl -who looks right like Supergirl◊- seduces Mordru, a bearded, wrinkled, old lecher.
- Ships That Pass in the Night: Supergirl and Dev-Em, who never met in Pre-Crisis continuity, become a couple.
- Unexpected Character: This story features virtually every hero and villain created before 1985, as declining to introduce Post-Crisis characters. So it was a bit of a shock when, after sixty chapters, a Post-Crisis character made it to the scene. And that character wasn't an obvious choice like Superman, Supergirl or Batman... but Destruction of the Endless, a character notorious for his unwillingness to interfere in mortal affairs.
- Unintentionally Sympathetic: The story wants us to think Superman is being irrationally overprotective when he comes to blows with Dev-Em... no matter what Dev-Em acknowledged he looked to pick up a fight with him. No matter what Superman may feel less than thrilled to hear his cousin has become lover of a former delinquent who screwed him up purely for fun. No matter what Superman of 2499: The Great Confrontation hints their relationship will leave Kara broken-hearted.
YMMV / Hellsister Trilogy