partial product list for upcoming Transformers 4 toys was leaked from Takara. The list included indicates of a direction separate from Hasbro's plans. Now a new gallery of images have helped clarify that plan. For example, it apparently has the name of Transformers: Lost Age. The toys in this line are essentially re-decos of previous movie toy releases and in some cases repaints of new Transformers 4 molds.
One toy that got people excited was Dispensor which was hoped to be a transforming Mountain Dew machine from the first movie. Nope, instead its a Dew truck homage using the 2007 deluxe Payload mold. I am not aware of Hasbro choosing to follow Takara's plan in the US but from looking at the pics, I don't see the point of it. In most cases the molds have been re-used three or more times already stateside and many were peg warmers. The full gallery of current images head to Unicron.com or TFW2005.