I really like the pairing of UW control and foretell flavorwise as well, since control is all about being clever and being on top of the game. Hopefully we'll get enough density of cards in blue and white for this!
Edit: Also uh is "foretelling" what you do when you exile the card facedown or when you actually play it? Seems like it should be the exiling?
Should be the act of exiling it facedown. The "foretell cost" should just be the alternate cost when you re-cast it. So Ranar lets you exile the foretell cards for free instead of the , but you still pay the alternate cost when casting it down the road.
I think you might have enough foretell cards at this point. The counterspell and wrath are the biggest draws to this, but if you were to draft the others listed, you'd also have the options of a card draw spell or a sizable flyer. The subgames with hidden information can get pretty fun. Especially in G2 once your opponent has seen one or two of these cards.