Background Pony #7091
"@AspectofBlood21":/images/1886618#comment_8452723
If I remember correctly, the original plan before the series started was not to have Nightmare Moon defeated in the premiere but to have it as a season long arc (with Luna being redeemed at the end of the season). But Hasbro wantedit the episodes to be stand alone.
As for why she left, Hasbro continued insisting on changes and eventually she couldn't deal with it. There's even some rumors that Hasbro starting to toss around the idea of Equestria Girls around the time and we know that Faust hated Equestria Girls.
If I remember correctly, the original plan before the series started was not to have Nightmare Moon defeated in the premiere but to have it as a season long arc (with Luna being redeemed at the end of the season). But Hasbro wanted
As for why she left, Hasbro continued insisting on changes and eventually she couldn't deal with it. There's even some rumors that Hasbro starting to toss around the idea of Equestria Girls around the time and we know that Faust hated Equestria Girls.