Howling:Omega symbol in TOA/SAF And AGMGTW

In the episodes Time of Angels and Flesh and Stone all the clerics and River all have a symbol on their arm. It also appears on the door of the room where the Angel tried to get out of the screen Its also in a Good Man Goes To War at 0:07 on a banner (three of them) behind the man who also has it on his hat

Apparently this symbol is the greek letter omega with the roman numerals for 2, now this could mean anything :

1) River is on their side (highly unlikely, as we know she turns good when she realises she is River)

2) They are omegas fraction/army

3) A red herring

4) Maybe the old Doctor Who enemy and fellow Timelord 'Omega' is back?

i dont know what to think but there please post your ideas or if you see the symbol anywhere else

Whooligist 19:54, May 30, 2011 (UTC)