Howling:Everything Changes

So. With the River Song mystery deepening and next series supposedly being when everything changes, what does everyone think this is? Personally, I think one possibility is the return of Omega and the Time Lords. With the Pandorica having reset the universe, it is possible that Gallifrey has also returned. If "the voice" is Omega it could be plausible that he would cause the cracks to make the Doctor reset the universe and bring back Gallifrey. Now, River said that "that's when everything changes" which it would if the Time Lords returned. The man that River killed could be Omega, perhaps in the series 6 finale, because, as the person who created time travel, he would be the one who would have allowed the Doctor and River to meet, possibly even the "best man" at the wedding? Does anyone else have any other theories as to what this may be? The Thirteenth Doctor 18:15, June 30, 2010 (UTC)