well, i do actually like to imagine my own motu storylines too.
for faker i have at least two different "origins": in both of them he's a human being (i'm for a technology free eternia!). in one he's adam and adora elder brother corrupted beyond his will by "uncle keldor"; in the other one he's a warrior with the power of mimic others appearance and powers: when he used his capability near he-man he's been permanently transformed and kept part of the power, so he's a formidable foe for the heroic warriors. he's not really bad, but skeletor put scare glow alongside him
to constantly subdue his will and keep him to the evil side.