The Princess Who Killed He-Man?: The Story of She-Ra: Princess of Power
https://www.youtube.com/watch?v=FSs66O0mBU4
She-Ra: Princess of Power is an American animated series produced in 1985 by Filmation. A spin-off of He-Man and the Masters of the Universe series, She-Ra: Princess of Power was aimed primarily at a young female audience to complement He-Man's popularity with young males.share
At the time He-Man was still reaching a mostly male audience and Filmation and Mattel decided to target a whole new audience by creating She-Ra: Princess of Power.
Did it work? Depends on who you ask.