I highly doubt they will ever make a WoW2 - it's much too expensive and a massive ordeal to do such a thing, and rather pointless when they can simply create new expansions and mods and keep their customers' interests high.

I wouldn't be surprised of a Warcraft 4, but I wouldn't expect one any time soon. World of Starcraft would be cool, but wouldn't really work due to the nature of RPG's being more 'old-fashioned', although it'd certainly be an interesting concept.. they have the races and storylines all there...

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