During a panel discussion on StarCraft II it was revealed that Warcraft IV would use the same trilogy release strategy, which they say ensures greater quality.
There we have it then, Warcraft IV is basically announced, sort of. Fans have been screaming for new Diablo, Warcraft and StarCraft - then they all come along at once.
Sadly there's no teasing artwork or anything for Warcraft IV and technically it's still not official so put on your rumour caps everyone.
"It’s nothing that we’re working on right now," Blizz co-founder Frank Pearce said at this years GC on a possible Warcraft IV.
"We have development teams working on Wrath of the Lich King, StarCraft II, Diablo III, and when those teams are all off the projects they’re working on, they’ll be intimately involved in the the discussions about what’s next."
Source: Hellforge