Howling:Omega symbol appearances

Have there been any appearances of the Omega symbol? River Song has a patch on her in Time of Angels/Flesh and Stone which has a symbol very similar to it. Are there any other appearances? If there are a few, this could be a set-up just like Vote Saxon was. The Thirteenth Doctor 10:40, June 28, 2010 (UTC)

the symbol that appers in toa/fas also aperes in the new trailer for a good man goes to war at 0:07 it is on the three banners and on the mans hat i have no idea what it means but still there --Whooligist 20:25, May 30, 2011 (UTC)