You should not trust any information available on that website. Most things are just speculations, some I can even certify to be wrong.
However I can approve right know, that the next Farming Simulator will be called 2013 and that it will be released next year.
PF is not created by us (GIANTS), that's why we do not have any information about it here or on the Farming Simulator website.
To tide over the time until FS 2013, I can very much recommend Skiregion Simulator 2012 which will be released this October. It will be very similar to FS except that you are working in a ski region. There are even tractors you can use