Via TFW2005 comes a blog posting of several Hasbro products for this year in the UK. (which means, dates for the US and here could be very different)

One of the items was a feature paragraph on a new Rescue Bots toy, a Dinosaur Optimus Primal with electronics.

Optimus Primal: Ages 3-7, Available Autumn 2014
Introducing Optimus Prime as you have never seen him before! This large-scale Optimus Primal figure converts from robot to T-Rex! The Optimus Primal figure comes to life with lights and over 20 sounds and phrases and offers distinct play with 2 modes- Bot and Dino. Easily convert from robot to T-Rex with a simple twist, but Optimus Primal has one touch conversion from Dino to Bot mode. Other features include real Dino chomping action, a rescue platform in Dino mode that works with the 2 inch figure world and a working rescue drill.
A small photo of the robot mode is at the link above, but BE WARNED - there are movie spoilers, so just scroll through the images and don't read anything.
(or look at the top of the TFW posting, but don't scroll down, as the movie spoilers are there too)