This is indeed the Prophecy of Theer.
I gotta jet for a bit but Ill post some more details on some research Ive done today. In the mean time enjoy this, a nice video I found showing better angles of Mixxits alternative picture of the symbols.
http://www.youtube.com/watch?v=VyRli9g8ZH4
The center blue symbol is said to be the symbol of the Y'dal, the first dark elf creations of Innoruuk.