Y'Shaarj is dead. Though it would be nice if Blizzard commissioned a image of him. Also just to answer if the other old gods are dead or alive. I'm erring on the notion they are dead outright by "Our" hands. Both were extremely weakened by their imprisonment. Of the two we've directly dealt with, Yogg was the one much more active and outright consolidating his power. N'Zoth though, is still active...and takes the crown as the "most active old god" alive. Man we are gonna be dealing with something far far worse than anything that has come before.