It seems as if Paramount has Transformers 5 slated for a 2017 release as what looks to be a leaked Hasbro promotional document has hit the net, which includes concept art for Transformers 4 as well.
The PDF has icons listing Hasbro’s movies and animated plans where we see Transformers 5 coming Quarter 2 in 2017.
[[wysiwyg_imageupload:14782:]]
Likewise, we get some art for various characters from Transformers: Age Of Extinction including the following Optimus Prime and Grimlock art.
[[wysiwyg_imageupload:14783:]]
There also looks to be plans for new Transformers animated shows in 2015 and 2016 as well.
[[wysiwyg_imageupload:14784:]]
[[wysiwyg_imageupload:14785:]]
(via tfw2005)