Old news is old:
http://ttabvue.uspto.gov/ttabvue/v?p...&pty=OPP&eno=1
Yup all the media is necronewsing this shit.
And DotA/DOTA2 aren't ****ing moba.
DotA stand for Defense of the Acient while DOTA stand for nothing.. this alone mean that even if blizzard have the right ( and it doesn't ) to sue Valve they can't do nothing because DotA and DOTA are two different things.
Actualy Valve can sue Blizzard about " Blizzard DOTA " but they don't care.
And this fail attempt from Blizzard is from November with 0 progress, they are clearly using this for ads on Blizzard DOTA because they already know they can't win this.
Oh and Blizzard is so mad about the lost opportunity ( why they didn't hire IceFrog in all this years? ) that is making is own on SCII and on Diablo3 too ( yes is going to be one of the pvp mode )