I just figured that if he finds out he's actually a cyborg and that his entire life until now was a lie he'd might go all "fuck everything" and join up with his 'real' family. But yeah it might be abit drastic switching sides if you say so.
Well, I'm not sure about having a city called Asgard. I was thinking about keeping the myth-names theme only with that certain secret government organization, and that everything else (like the country's name, and cities and school and everything else that isn't directly related to the Ragnarok) will have original names and won't be related to the myth.
I do think that Valkyries can be either a third faction, or they can be Tyra's organization's hunters/squad/whatever. Valkyries is an awesome idea man!
When I said exaggerating with elements I was talking about the idea of having a corrupted powers ruling the segregated city.
In the meantime I just doodled some cool designs for Hati and Skoll, just as ideas for how they'd look.