Slight problem with this Dota 2 thing. There is a four way lawsuit over the name between Blizzard Entertainment (Warcraft III's Dota), S2Games(Owner of Defense of the Ancients - the original game before Warcraft III), RiotGames (Creator of WC3 Dota and LoL), and Valve (Publisher and Developer of Dota 2- I hate you Valve!!!).
The reason being, RiotGames believes they own the name of DOTA for the owner created the original Dota on Warcraft III, however he used it using Blizzard Entertainment's software, making Blizzard think they own the rights to the name. S2Games is fighting because they legally own the full name "Defense of the Ancients". VALVe is in there because they are naming the game "DOTA 2" and the other guys are like "WTF thats our name!"
[Just to help you get filled in, I'm pretty sure VALVe hired a man named Icefrog who is one of the original creators of Defense of the Ancients)
One way or another, those pricks at VALVe are going to make a DOTA like game and probably ruin it just because they are money hungry.