* FranchiseKiller: ''Crisis'' killed ''All-Star Squadron'' by forcing it to take place in the standard DCU--not only did this mean it couldn't make use of a lot of major characters, but it also forced Creator/RoyThomas to take a bit of a hammer to the book's continuity, when ContinuityPorn had been one of the book's main selling points. ''ComicBook/JusticeSocietyOfAmerica'' becoming the preeminent Golden Age-focused book pretty much nailed its coffin shut. There's now so much overlap between the two books that any attempt to do an ''All-Star Squadron'' revival would probably just get most comic fans wondering why they changed the JSA's name.
* WhatCouldHaveBeen: The Quality Comics version of Wildfire was going to be a member of the Squadron, but because DC didn't want to get her confused with Wildfire from ''ComicBook/LegionOfSuperHeroes'', they created Danette Reilly, the second Firebrand (one who actually had fire powers) and sister of the original.