you know, i don't think he'll be obidiah, his dad, happy, or even the mandarin
two antagonists for an origin movie would be too cluttered (unless they go for the batman begins approach and keep him strictly in the business world)
i think he'll be:
Sal Kennedy
for those not in the know, sal was introduced in ellis'/granov's iron man and since they're using the granov armor, it wouldn't be a far shot saying they're using parts of that origin.
he's def a father figure, looks the part, can act the part (almost the dude 2.0)
maybe favs will tweak it so he works for stark as an advisor?
it's funny how granov drew stark looking like tom cruise and now 2 yrs later rdj is attached to it. i bet in the next year joey Q will pressure the artists to make stark resemble him more