!!! Comic Series

* ExecutiveMeddling: Starhawk was supposed to be turned evil and killed off, but the editors wouldn't let Valentino. His departure allowed Michael Gallagher (who did like the character) to keep him around and redeem him.
* FanNickname: ''[=DnA=]'' for the creative team behind the 2008 series, Dan Abnett and Andy Lanning.
** Gotgino(Guardians of the Galaxy In Name Only) for Bendis run on the series.
* WhatCouldHaveBeen: Jim Valentino has an entire thread [[http://www.imagecomics.com/messageboard/viewtopic.php?t=144 here]] for this Trope. Essentially: Starhawk and Vance Astro would both die, the team would fight Kang and several of their groups of enemies (who would be redesigned to turn them into even more blatant Legion of Super-Heroes analogues), the Protege would turn out to be the Beyonder, and by the end of Valentino's planned run, the group would morph into a Legion of Super-Heroes type organization with a roster of over several dozen heroes.

!!! Film

* AscendedFanon: Vin Diesel's casting as Groot resulted from a fan-made rumor.
* ColbertBump: After appearing in the trailer, "Hooked on a Feeling" by Blue Swede sold more than 2000 downloads within 24 hours of the trailer being released - a ''700%'' increase in sales.
* DyeingForYourArt: In order to play Nebula, Creator/KarenGillan shaved her head completely bald.
* HeyItsThatGuy:
** [[Series/ParksAndRecreation Andy Dwyer]], [[Film/TheHangover Phil Wenneck]], Wrestling/{{Batista}}, [[TheFastAndTheFurious Dominic]] [[Creator/VinDiesel Toretto]] and [[Film/StarTrek Nyota]] [[ZoeSaldana Uhura]], who make up the Guardians of the Galaxy.
** [[Series/DoctorWho Amy]] [[Creator/KarenGillan Pond]] and [[Film/TheHobbit Thranduil Elvenking]] play Nebula and Ronan the Accuser, the BigBadDuumvirate, and [[FearAndLoathingInLasVegas Dr. Gonzo]] plays The Collector who will [[Film/TheUsualSuspects flip ya... flip ya for real]].
** [[Series/TheWalkingDead Merle Dixon]] is Yondu.
*** He was also [[Film/{{Mallrats}} Mr. Svenning]].
** [[TheSagaOfDarrenShan Mr. Crepsley]], [[Film/FatalAttraction Alex Forrest]] and [[ShaunOfTheDead Pete]] play members of Nova Corps.
* HeyItsThatVoice:
** Star Lord (Chris Pratt) was [[TheLegoMovie Emmett]].
** Nova Corps Officer Rhomann Dey (John C. Reilly) is Disney/WreckItRalph, while the other officer who says "What a bunch of a-holes." (Peter Serafinowicz) is the voice of [[ThePhantomMenace Darth Maul]].
** Groot (Creator/VinDiesel) also voiced WesternAnimation/TheIronGiant.
** Commander Rael (Glenn Close) voiced [[Disney/{{Tarzan}} Kala]].
* PlayingAgainstType:
** Creator/KarenGillan as the villainous Nebula.
** Who would have though that stone-cold badass Creator/VinDiesel would end up playing the gentle-yet-badass Groot?
*** Anyone who saw ''WesternAnimation/TheIronGiant,'' duh.
* PromotedFanboy: Dave Bautista has gone on record that he wanted the role of Drax more than anything else in his life and cried when he found out he got the part.
* SoMyKidsCanWatch: Djimon Hounsou has admitted in an interview that he took the role of Korath the Pursuer for his son, who loves the {{Superhero}} genre.
* ThrowItIn: According to James Gunn, Peter flipping off the Nova Corps came from Chris Pratt goofing around on set.
* WhatCouldHaveBeen:
** [[Series/GameOfThrones Jason Momoa]] was originally attached to the role of Drax the Destroyer, but lost the part after reported salary disputes.
** Before being cast as Yondu, Michael Rooker expressed interest in playing Rocket Raccoon.
** There was a rumor about Creator/DavidTennant voicing Rocket Racoon.
** Early drafts of the script included Bug. He was even back in the Guardians' comic relaunch to promote the character briefly.