According to several different online articles TF5 has been announced for 2016. Guessing they assumed TF4 is going to make some serious bank



Paramount Pictures Senior Vice President Edward Ryan promises Transformers 5 in 2016 at the TF4 Screening during CineEurope 2014 Barcelona
Some links can be found here:

http://www.seibertron.com/transforme...inction/30573/

http://transformernews.blogspot.com....d-to-2016.html



I don't think anyone will be remotely surprised by this annoucement, but it's nice to have confirmation