It would be cool if this were an April fools joke, but unfortunately I don't think it is...
http://www.roadandtrack.com/future-cars/first-looks/2014-ford-mustang-sedan
http://www.roadandtrack.com/future-cars/first-looks/2014-ford-mustang-sedan
That story is from March of 2012. Also, 2014's are sitting on dealers lots. There is no sedan.
It also says Update: April Fools at the end of the article.
This. Its at the bottom of the artical.