There was a couple of things that never made it to the final cut in ROTF. During production a lot of rumors spread throughout every computer, one of those was SkidsMudflap combo. Believe it or not, I actually was looking forward to watching those neat chevy's perform some combo action some time in the film, aside from Devs. Skids and Mudflap never combined into a bigger robot in the movie, the only thing that came close was the Ice-Cream truck, but never during the battle along Devs or anywhere else in the film. So, will this remain this way, or will we expect to see them combine in a future film? maybe something being kept strictly for part 3, who knows, feel free to share any thoughts.