There's some inspiration drawn from the Shattered Glass canon AU for this Starscream's AU history and personality. But this Starscream is specifically meant to be tied with "Transformers Prime." As there isn't really a specific canon Shattered Glass/Mirrorverse for "Transformers Prime" (yet), I started thinking up that variation, which included this idea of Mirrorverse!TFP!Starscream.
Re: QUESTION
There's some inspiration drawn from the Shattered Glass canon AU for this Starscream's AU history and personality. But this Starscream is specifically meant to be tied with "Transformers Prime." As there isn't really a specific canon Shattered Glass/Mirrorverse for "Transformers Prime" (yet), I started thinking up that variation, which included this idea of Mirrorverse!TFP!Starscream.