It was already known to be the 'Onslaught' mould, and images released by the official collector club shows it to be an Autobot in vehicle mode, and a Decepticon in Robot mode, called Heatwave.
It is said to have a new Combiner Head, which isn't shown, but the rest of the toy looks the same.
It keeps with the red and blue colour scheme of the other four figures.
http://www.transformersclub.com/heatwave09.cfm