The Colombians have been getting a lot of official image releases lately, reminding me of our early days when the smaller, less significant branches of Hasbro were more likely to give out official pics and info before Hasbro America deemed it ready to be released.
The Stomp & Chomp Grimlock is a big electronic toy for TF4, but is part of the Gimmick line "One Step Changer", so don't expect a great toy for us older collectors. This one is for the youngens, who have parents willing to fork out a lot of money - it's US$80 in America, so expect at least AU$100 here (the larger/expensive figures here are usually closer to US pricing than the smaller size classes).
One Step Changers will come in three sizes, with Grimlock being the large size. It comes with an Optimus figurine, which activate some electronic sensors, and allows you to play out the promo scene of him riding the back of Grimlock.
(it is worth scrolling down the link to see a fan's photoshop of this toy into Trypticon colours... noting that it will be comparable in size to Generations Metroplex. Now if only it was a regular figure and not a simple 1-step changer, it would have potential to be a Generations Trypticon)