That possibly sounds a bit heavy for a children’s cartoon of the CGI era, although DreamWorks Animation has done a solid job of walking the line of more mature themes in children’s programming with Voltron: Legendary Defender.
An interesting question revolving around the upcoming She-Ra series (which is slated for 2018), is where the first part of the story will take place.
As such, it’s possible the creative team will see no problem in giving its heroine this darker introduction, or possibly something similarly dark.
As any die-hard fan of the character will remember, She-Ra did not have the same blessed life her brother Adam did while romping around Eternia with Cringer.