http://www.pcgamer.com/2010/10/23/the-first-heroes-in-sc2s-dota-map/

Holly crap Blizzard to make their own dota map for starcraft 2

It occurs to me I should have put Dota in the title...

I'm really not sure if dota would work for sc2, cause of lots of little things that i can't be bothered going into right now, maybe later. Whatever the case, i'll keep an eye on it

well there is already one DotA clone for SC2, things like fully customisable UI and things mean the games could be even better than the ones for WCIII and from the looks of things Blizzard will be adding new models. The only problem I see comes from how custom maps are handled in SC2. But if it's popular and blizzard are committed to making it work maybe they will add a ranked ladder.

their is already one.

but this one is made by Blizzard them selves...

how will that change? its going to be the same concept.

but made by blizzard...

more info http://sea.battle.net/sc2/en/blog/88213#blog

Blizzard DOTA
 

After seeing so many great player-made maps based on Aeon of Strife and Defense of the Ancients, the designers felt inspired to create their own adaptation of these legendary StarCraft and Warcraft III custom mods using updated graphics, customized character models, and epic new environments.

Blizzard DOTA will be a 5-vs.-5 mini-game with a chess-board theme, featuring three lanes, two bases, creep-based farming, and an emphasis on protecting key structures. Players will get to choose among 12 iconic heroes from the Blizzard universe, including superstars like Kerrigan, Sylvanas, Jim Raynor, and Muradin Bronzebeard, each with his or her own unique abilities and tactics.

It's important to note that all of these custom maps are still in their formative stages and do not yet have a release date. While BlizzCon attendees have a unique opportunity to check out early demos, these maps will continue to be tuned, polished, and possibly even augmented as the development process continues to ensure that they’re epic, balanced, and—most importantly—fun to play.