"One of the important things to note with that space is the DOTA everyone plays on Warcraft 3 is not particularly accessible to the novice," said Blizzard Product Development and Co-Founder Frank Pearce. "One of the game development philosophies we have at Blizzard is: easy to learn and difficult to master. That mod for Warcraft 3 doesn't really fit that description."
Meanwhile, elsewhere in the lands of the massively online battle arena genre, Valve is targeting a 2012 launch for Dota 2 and League of Legends continues its ascension with a new mode, expected soon. More official details about Blizzard Dota, along with however it looks now, will likely be shared at BlizzCon in October.