Also while it is an impressive theory, it stated that all Old Gods were imprisoned (Ok to be fair that never stopped Blizzard before).
Y'Shaarj was sealed beneath the earth and if the fifth Old God is located in the Inner Kingdom so might he be. It is stated by the War of Ancients trilogy that only three attempt to escape their prison. One is dead and it is highly possible that the fifth sealed himself under ground or that he escaped his shackles prior to the War of the Ancients.
And all the random events were done by Old Gods in to free themselves or reasons beyond mortal understanding and were done by mere influence.
The only problem is their influence doesn't reach very far while they're imprisoned the nightmare originated from the Rift of Aln that's located at same place as the maelstrom, Azshara was thrown into the waters somewhere around the maelstrom, the Tol'vir lived near Ahn'Qiraj, the Vrykul lived in Ulduar Ulduar, the mecha gnomes lived in Ulduar, the Earthen lived close to Ulduar. The is a pattern you know. Of all the confirmed corruptions there is not a single one that has been done from a distance by the imprisoned Old Gods.
I do hardly find RPG books hardly appropriate source for Lore but wiki disagrees with me.
In that case wowwiki is wrong, RPG books have been declared by Blizzard as non-canon. Your argument that they are atheists hold no value. (You really aught to check out wowpedia instead) Source:
http://us.battle.net/wow/en/forum/topic/2721372142?page=1
but what we can assume is that they obviously were part of Old God abiding race but got separated and isolated in Northrend.
Yes they were isolated and lived underground, you know where the Old Gods are imprisoned. Do you remember what happened to the dragon aspect that had connections to the underground?
To be honest I always assumed Forgotten Ones were creatures of Old Gods, and this one in particular would be servant of Yogg Sarron.
Though that has never been stated nor indicated if they were trully serving Yogg-Sarron they would have flocked to his side once he was trying to break free. But all we know of them is that there are hoards of them in the Inner Kingdom as we saw in WC3.
Haven't been used in WoW probably because Blizzard forgot what they planed in the first place and Old God related stuff has been redesigned since warcraft 3.
That doesn't remove them from existence, by that same standard Queen Azshara no longer exists. What happened in the WarCraft games is still considered cannon. Besides there were a few of them found in the upper Kingdom in WotLK, they still exist.
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