A press release detailing plans for localization in Latin American Spanish for Mexico, Argentina, Brazil and Chile covers the subscription model. By picking up the title for $299 MXN / $119 ARS / $13,900 CLP -- about $30 USD -- gamers will be given access to the single-player and multiplayer portions of the game for 60 days. Once that period ends, they can re-up their subscription for a fee (which hasn't been disclosed yet). The other option is to download the game directly from Blizzard for a one-time fee of $59.99 USD, granting permanent access to the title.
During Activision's annual investors call yesterday, Blizzard CEO Mike Morhaime confirmed that Blizzard would pursue a similar pricing structure for Asian and Russian territories.
Source - Official press release
Source - Big Download confirms Asia and Russia inclusion