Originally Posted by
Golden Yak
This is only speculation, but I think Y'Shaarj could have possibly been revived if we hadn't stopped Garrosh. The whispers of Y'Shaarj's blood make reference to him feeding - I think if his power had spread through Garrosh's Horde and they had caused enough havoc and destruction for his power to feed on, Y'Shaarj might have been able to fully resurrect himself. Just speculation, but I think its possible for a 'mostly dead' Old God to come back to life if there's still enough of their corpse and power hanging around - in the comics, Cho'Gall nearly revived the dead corpse of C'Thun, and the closer C'Thun came to being revived the more powerful and monstrous Cho'Gall became, just like how Garrosh mutated into a huge monster during his fight with players. Cho'Gall and Garrosh were both defeated, so C'Thun's power might have 'burnt out' the same way Y'Shaarj did, making them both fully dead. If Yogg-Saron is only 'mostly dead', he might still be eligible for resurrection.