2k are the publishers, at least these days. Don't think we have them, so it could be a while.
Could also theoretically make the deal with Firaxis (the devs), but we also don't have them.
So, to summarize: The odds of getting Civ are no greater, and no less, than pretty much every other game on the wishlist.
Firaxis seem to love their community. If you can get a hold of them, a deal wouldn't be too hard to work out.