T-Mobile and Nokia announce December 14th event, Windows Phone coming?

Big news from Bellevue, as T-Mobile and Nokia have just announced that a unique event would be held the evening of December 14th, promising something “special within the works.” The firms were too smart for us this time, choosing to not reveal any code names via the picture file; however, the tiled design of the invite seems a slightly strong indication that Windows Phone is within the mix here. Could it’s an existing Lumia device, or will or not it’s something completely new? We have now precisely one week to mull over the prospects.