Have you guys thought about this? Now Microsoft owns Blizzard that means that some power of other studio's can be used to help out Blizzard with their franchises.
What if Relic Entertainment or former Ensemble Studio, known for creating Age of Empires, assists Blizzard developing Warcraft IV.
I think that would be epic. A new Warcraft RTS with it's phenominal storytelling combined with epic large battlefields. Not just an army of 12 humans/orcs, but 100+ humans/orcs.