Do any American copies actually include the Dark Aeons?

[Rostum]

Well, but I find it pretty likely that the Americans would sooner or later get a version that included those things.
Americans have to import the versions with the Dark Aeons, and giving them an own American Dark Aeon version wouldn't exactly hurt.

Right now it's like "oh no, I'm an American so I can't play the Dark Aeons version! I need to import one!"

You're in Sweden, your copy is PAL and will have Dark Aeons. I don't know why you would have imported the American version.