Hot off the trail of the Krank and Stax comes MM-IV Ollie and MM-V Sonic. Ollie is based on the 1986 Transformers the Movie character, Wheelie, and Sonic looks to be based on the Gobots character, Turbo. According to X-Transbots, these would be released around the June time frame.
These will be 4.64 inches tall. As you can see, they share the same body/mold.
Other X-Transbots products can be seen here: http://www.x-transbots.com/products.asp