Meh, I am guessing that that things are just being hidden like they always are by companies. No point in complaining about it anymore because all the links are gone and everything we Remember reading in the first place has been removed or Edited by Riot in order to make it look like they never mentioned anything about Dominion.
I to, as I have seen many other say the Exact words, Dominion will be released on the NEXT SCHEDULED MAINTENANCE. Doesn't mean they can't just have the people they pay go and edit what they want to look like so other people will just think they must have been mistaken in what they read or heard.
It's only when people have Proof like a Screen shot from a Red stating certain things, which then they have to fess up to something, in which this case the Red in this Thread states that the other Red had ill knowledge of the Dominion Update.
Just wait for it people, it's not the end of the world if it doesn't come out tomorrow...or today. Just means more waiting and more stupid things like solo pugs XD.
In the time being, go play a 6v6 match on Twisted Treelines Cause that is actually really intense and really fun XD.