According to Lou Scheimer in the book "Creating the Filmation Generation", the first suggestion for She-Ra's name was 'She-Ro', referring to He-Man's original name, 'He-Ro'. But Lou thought that name didn't sound feminine. Writer Lawrence G. DiTillio then came up with She-Ra, referring to the Egyptian word for god, "Ra". However, Ra actually means sun in the ancient Egyptian and not the word god. Ra is the name of the ancient sun god.
'Lawrence G. DiTillio' was responsible for most of the series bible and the character names. The original idea was for Adora to be called 'Eve', to compliment Adam. But this idea was dropped because the characters were twins. The Crystal Castle was originally called 'The Palace of Power'. Hordak's original name was 'Reaper'. Glimmer was going to be called 'Shimmer' but her name was changed when it proved difficult for the voice actors to say.
Writers Lawrence G. DiTillio (usually credited as Larry DiTillio) and J. Michael Straczynski were responsible for keeping track of continuity and worked as story editors on most of She-Ra's first season. When they asked to be credited as such for the second season, there was some resistance from other Filmation employees, and the two of them decided to leave the series instead.
The series' writers found that creating action scenes for She-Ra even more frustrating than with He-Man because not only did they have to minimize the violence, but they also had to contend with what they considered sexist pressure against the idea of a female hero being so forceful against challenges.
Spirit/Swift Wind was originally written to be a female character. Spirit could not speak before his first transformation into Swift Wind, and originally, only Swift Wind was to have the power of speech. Therefore, in many early episodes, Spirit has no lines. but later on, both Spirit and Swift Wind could speak.
While He-Man and the Masters of the Universe (1983) was developed by Filmation based on the toy line by Mattel, this spin of series featured much more of an cooperative approach, with artists from both companies developing aspects of each character.
The "Star Wars" films, most notably "Star Wars: Episode VI- Return of the Jedi" were strong influences behind the cartoon. The cartoon is about the Great Rebellion fighting to free Etheria from Hordak. Princess Adora/She-Ra is He-Man/Prince Adam's long-lost twin sister, separated from Adam when she was kidnapped by Hordak as a baby and Adora/She-Ra who serves Hordak as the Captain of the Evil Horde sides with the Great Rebellion when she learns the truth of her past.
She-Ra/Adora never appeared in the short-lived cartoon "The New Adventures of He-Man" which was a sequel series to "He-Man and the Masters of the Universe" and was never mentioned. She-Ra could have also traveled forward to the future to Primus to help He-Man with Skeletor, Flogg and the Mutants. Instead, Teela was sent to Primus in the future to help He-Man.
The science fiction film Galaxis (1995) starring Brigitte Nielsen was originally considered to be a live-action film of "She-Ra", which would be a spin-off of "Masters of the Universe" and the plot of the film would had been similar to "Masters of the Universe". The film would had been about She-Ra, as leaves Etheria and goes to Earth, as she sets out to Hordak, whom has also gone to Earth find a mystical crystal, which is believed to destroy all life on Eteria, Earth and the known universe.
The trivia item below may give away important plot points.
The show reveals that Hordak mentored He-Man's nemesis Skeletor, whom eventually betrayed Hordak. According to Skeletor's origin story in the 2002 reboot of "He-Man of the Masters of the Universe", Skeletor was an evil sorcerer warlord named Keldor. When he tried to assassinate the Eternian Elders, his face was burnt with acid. Future Eternian King Randor deflected the acid with his shield. Hordak saved Keldor, replaced Keldor's head with a skull, and renamed him Skeletor.