"The Final Titan"?

[Aquamonkey]

"In the time before time, when the world was still in its infancy, a battle between a Titan and a being of unimaginable evil and power raged on this very soil. The prophecy is unclear about whether or not the Titan was vanquished.... but it illustrates that a Titan fell." - Geologist Larksbane

The above quote specifically says that 'fell' may not mean died. There is always 'fell from grace' and Sargeras is known as the Fallen Titan.

Sargeras left the Pantheon before they got to Azeroth.