We now get a look at a Micromaster from series three - Mudslinger, who is noted as being part of the Off-Road Patrol.
This should be one of the smaller sized cards, that are the size of a battle card, and despite being a Common card with just 5 stars, it comes with a lot of special abilities, which you'd expect from a Character with 10 stars.
(cutting back on the star count might have been seen necessary, otherwise, the 25 star limit wouldn't allow you to have more than one main bot if you also wanted to have a Micromaster and Battlemaster on your team.


EDIT - it looks like a Micromaster has already been revealed in the past (Redheat), and this very comprehensive review on Seibertron of the 3rd series reveals, is a must read for those interested in the TCG.