Elves as hippies... I can see them subscribing to the idea of "make love, not war."
I like the idea of Black Riders on motorcycles... Maybe the OCC could make them.

And they could all wear full leather trench coats and ski masks. Instead of driving cars after the bridge incident though, they should have hang-gliders or jet-packs. Keep to the flying.
One potential problem I can see though is casting the orc armies. I mean... no matter who you get for it, you'll have some wannabe-do-gooders saying that you're being politically incorrect, and even if you pulled a Star Wars and did something like robots or Storm Troopers, you'd still get nuts trying to make metaphorical connections.
Fea