With the release of the Ravenloft adventure I really can not see them putting out anything that does not hype that. If you release a supplement for OotA now then it would just confuse the general DnD public who can only hold one concept in their mind at any one time.
Yes. I was assuming this would be for future products. Though I don't suppose it would hurt them any to release the material for older paths at the same time without fanfare.
AD