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* ArcFatigue: The Insane Genis-Vell arc in Peter David's run. Initially, it was supposed to run for 6 issues as part of the U-Decide contest but when Peter David won the contest, he kept the arc going and it took almost a year and a half for it to be resolved. After awhile, people stopped caring about Genis and grew to dislike him and the [[CerebusSyndrome direction the book was going,]] leading to it being cancelled and [[EndOfSeriesAwareness Issue 25 reflecting on this.]]
* BrokenBase: Over which ComicBook/CaptainMarvel -- [[BaseBreakingCharacter if any]] -- was a worthy successor to Mar-Vell. Monica, Genis-Vell, Phyla-Vell, Noh-Varr or Carol?
** With Monica, it mostly stems from her not getting a chance to have her own title. Some fans were simply interested in seeing where the writers would go while trying to create challenges for someone moving at light speed in the form of any light on the electromagnetic spectrum. For someone who also had military discipline, in stories that could have unexplored extra dimensional angles. These fans tend to think Genis and Phyla were contrived and unnecessary characters. Genis and Phyla do have their fans though, and not just for Peter David's run, but on a conceptual level. Monica certainly had potential to bring a lot of new and different things to Marvel comics, but not everyone thinks those new and different things should have been forced into a Captain Marvel book. Genis and Phyla lent themselves more readily to the style of [[SpaceOpera cosmos spanning story telling]] that made the first Captain Mar-Vell popular, and there is an argument that a completely unrelated character undermines the point of having a successor.
** Some fans argue which Peter David Genis-Vell series is the best. Some prefer the first book for its comedic elements and chemistry between Rick Jones and Genis but some find that Genis is a guest character in his own comic book while Rick and his supporting cast are essentially the stars. Conversely, the second series focused mainly between Genis and Rick while it went down a [[DarkerandEdgier Darker and Edgier]] route which some praised for being interesting and unique while some found that it meandered after Issue 6 and Genis became progressively [[DesignatedHero more and more unlikable]] as the Insanity Arc dragged on.
** There have been many arguments that Noh-Varr was a pointless addition to the Mar-Vell legacy by the time he showed up. People with this view point are divided on whether it all should have stopped, or at least slowed down with him, or whether it should have skipped him entirely and gone back to Monica, to Carol or even Genis. Still, some argue for the merits of a fascist kree that stands in such stock contrast to Mar-Vell, and like that the fascist Kree learns to appreciate what Mar-Vell stood for.
** When Carol got the title there were fans who collectively said "finally", believing she should have gotten it after Mar-Vell died and it all should have been left at that. Then there are fans of Carol who thought she was fine as Ms Marvel already, and thought giving her or anyone else the Captain Marvel title was just another pointless step in a pointless conflict with DC Comics, who owned the original Captain Marvel character(but lost the rights to use his name purely due to their own misuse of the property). Fans of Carol as Ms Marvel also tend to like Monica or Genis/Phyla as Captain Marvel and dislike the notion those characters shouldn't have existed, or couldn't have gotten the title back.
* CompleteMonster: May & June 2001 issues: Walker, or He Who Walks Beyond Life and Death Like a Colossus, was a [[EverybodyHatesHades death god]] of a distant galaxy who, seeking to impress Mistress Death, murdered every soul in his galaxy and entrapped them within him, [[AndIMustScream in horrible torment]]. When Death was repulsed and turned from Walker, he decided to murder her out of spite, hunting her to Earth where he attempts to get her attention by killing people close to the current host of death, even resorting to ColdBloodedTorture to draw her out. When Death refuses to show herself at first, Walker reveals he will happily take the Earth apart "molecule by molecule", willing to annihilate everything in his path solely for [[NotGoodWithRejection being spurned by the object of his obsession]].
* CrazyIsCool: Insane Genis-Vell for some. After [[WithGreatPowerComesGreatInsanity losing his mind to his Cosmic Awareness,]] he killed a sociopath hiding in plain sight by making him explode, conquered entire races by himself, punched his father’s former mentor to death and looted his corpse for his armor, entered Shi’ar, and later Skrull and Kree warships, and curbstomped them, came back from the dead, destroyed the universe by chaining and crushing Eternity to death and brought it back after shooting Entropy in the face.
* GrowingTheBeard
** The first few issues of Captain Mar-Vell's adventures were considered aimless and lackluster. When Jim Starlin took over and made the character truly ''cosmic'' --up to and including the first major arc of {{ComicBook/Thanos}} and the Cosmic Cube, and Mar-Vell attaining cosmic awareness to combat him-- he became one of the most popular and influential characters in Marvel's roster.
** Applies to Genis-Vell as well after his stint as Legacy was over and he was updated in {{ComicBook/Avengers Forever}} with the Peter David series following afterward.
* HarsherInHindsight: The incident of Captain Mar-Vell closing off a leaking container of nerve gas seemed to have been resolved satisfactorily when a friend arrived to administer the antidote, but it turned out later that the gas was carcinogenic which result in incurable cancer that later killed him. So when the cover of ''Captain Marvel'' #34 introduced the brand-new villain Nitro as "the man who killed Captain Marvel'' (by blowing himself up and thus damaging the gas canister), it was [[ExactWords an accurate description]], just with a delayed reaction.
* SugarWiki/HeartwarmingMoments: For as much of a TearJerker as it was, The Death of Captain Marvel was absolutely littered with these, up to and including the Skrull Empire, bitter enemies of both Mar-Vell's people the Kree and his adopted homeworld of Earth, sending a general to visit him on his death bed in order to present him with a medal, commending him for his bravery and military accomplishments that he performed ''as his enemy''. Even '''Thanos''' pays Mar-Vell one last visit to honor him (in his own way) before his death.
* HilariousInHindsight: Stan Lee created Mar-Vell so that the rights to the name of [[ComicBook/{{Shazam}} Captain Marvel]] would go to Marvel after DC let the rights expire. Stan Lee later wound up working with the DC character when he started ComicBook/JustImagineStanLeeCreatingTheDCUniverse.
* HoYay
** Phyla-Vell and Moondragon. Also Moondragon and [[ComingOutStory Rick Jones' wife Marlo]].
** The latter was so poorly received it was retconned as Marlo being overwhelmed by Moondragon's psychic power.
* IAmNotShazam: Before the ComicBook/{{New 52}} was set into place, a lot of confusion between DC's Captain Marvel and Marvel's Captain Marvel permeated discussions about the characters. Of course, once the TropeNamer had his name officially changed to Shazam in the ContinuityReboot, Marvel gained exclusive rights to the title.
* SugarWiki/MomentOfAwesome: For as tragic as his death was, one awesome moment came of it. While the Kree turned their back on Mar, the Skrulls dispatched one of their top generals to present him ''the highest decoration in the Skrull Empire'' for being such a WorthyOpponent to them.
* MyRealDaddy: Jim Starlin for Mar-Vell and Peter David for Genis-Vell.
* NightmareFuel: Genis-Vell going insane, full stop.
* RomanticPlotTumor: The Una/Mar-Vell/Carol Danvers love triangle was... awkward to say the least, even by [[UsefulNotes/TheSilverAgeOfComicBooks Silver Age]] standards.
* TearJerker: The Death Of Captain Marvel, full stop.
* UnintentionallyUnsympathetic
** The epilogue of the Odyssey arc in Peter David’s run forced Genis into having to murder his son in the crib since he will someday grow up to be a mass murdering monster…except a good chunk of Ely-Vell going evil rests on Genis’ shoulders. In the future, Genis’ future self wasn’t present during the invasion of the Earth and spent some time sleeping on the job, leading to the Earth being invaded. It’s not helped when Genis disappears to go forward in time to help Marlo, not realizing that he left Ely behind without a father for centuries. Ely even calls Genis on this, saying he can’t just up and disappear to go help people centuries at a time. Due to Genis being absent for most of Ely’s life, this naturally lead to Ely finding a way to fill the vacuum his father behind with The Magus. None of that justifies the [[MoralEventHorizon Moral Event Horizon]] Ely committed by killing billions of people to free his newfound master but Genis is completely to blame for what took place with his son. Had Genis not ignored his own son, he might not have needed to kill him at all.

** It’s made worse that Genis didn’t even need to necessarily kill his son. In the Odyssey arc’s ending, Genis shows he can influence the timeline with a decision he will make in the future which he uses to someday murder his future son. This is a power that could potentially be used to shape a better future for himself and his family but instead of resolving to do better, Genis instead decides to murder Ely in the crib. This ultimately makes Genis a bit of a hypocrite since Genis did far worse when he went insane. It’s possible The Magus would have potentially done worse than him but Ely’s own actions did not come anywhere close to what Genis did when he destroyed the universe and later restored it. It brings to mind what if Mar-Vell knew he would someday have a son that would commit so many evil actions even despite the possibility that he’ll try and redeem himself. If Genis got a chance to redeem himself, why is it that Ely doesn’t get one?
* TheWoobie: Genis’ whole life seems to be centered on this. He was aged to adulthood so he’d be strong enough to face his enemies (which cost him much needed maturity and experience), he accidentally detonated a Nega-Bomb which killed billions after trying to deactivate it in a set up by the Kree and Shi'ar, felt the ComicBook/{{Silver Surfer}}, his mentor die and used all his power to revive him when finding his corpse, fought his mentor when he believed Norrin was letting the people of Zenn-La perish until he was trapped in his surfboard and saw Zenn-La fade away into nothingness and was forced to confront the reanimated corpse of his father who killed his mother. This is all before he became Captain Marvel where his problems just got so much worse.
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