Since the first expansion will be boosters-only, there would be no way for the rules regarding Regions to appear until another starter set was introduced.
Actually, you could do what I.C.E. used to do with the Middle Earth CCG - they had a little rules update sheet in every booster - could have had Dark Horse advertise the comic on the other side to cover the cost. Just a thought...
Thanks for the info, Jason! Looking forward to the expansion!