The rumour that the Nurburgring was coming was started by EVO magazine, the same people who also said the game would have 24 people in online racing. At no point since has Turn 10 even so much as hinted the rumour had any validity at all. Turn 10 have not said the Ring is coming, they've not said it was coming by X date and they have certainly not said it would be coming at X price.
It's a rumour and has been only a rumour from the day EVO magazine published it and continues to be a rumour until such time as Turn 10 confirms or denies it, which they will do in the News section of this website (along with any other releases to media) and not as a response to an intemperate demand on the forums.