Russia can provide oil and nuclear services to the region..
Iran can have electricity and clout..but watch out --> there will be nuclear waste to deal with, and we may have to trust the Russians to make sure it doesn't fall into the wrong hands...
Al Qaeda in Iraq will no longer have easy access to recruitment opportunities, weaponry, trade routes, or advisers...
Now:
Russia can regulate the energy flows for the region...
US can use bases in Iraq to regulate the security of the region's assets and their interconnections...
Iran can regulate the psycho-social entities and their interconnections...
of course these should be areas of focus and not neglect other areas for each