The Squadron, made up of survivors from different Earths before the forcible integration that is the current Marvel Universe, has had a lot of trouble on the main Marvel Earth. In a bad spot on Earth, they were offered an escape route by Thundra, who wanted to get their help in the horribly named Weirdworld. Once there, the Squadron suffered a lot of immediate setbacks, such as the apparent death of Dr. Spectrum and Hyperion losing his powers.
Marvel has done a lot of different versions of the Squadron Supreme. The Squadron themselves started off as fairly obvious knock-offs of DC’s Justice League. Of the ones that are in this book, the analogues are fairly apparent- Hyperion is Superman, Nighthawk is Batman, Power Princess is Wonder Woman, Whizzer is the Flash, and Doctor Spectrum is Green Lantern. The Squadron had has several incarnations, and now, after Secret Wars, five survivors, each of a different Earth, bad together to make a new version of the team.
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