Your robots begin to subtly mutate - they are being influences by an outside source!
Suddenly they all resemble humans bulging with muscles, and can transform themselves into cars, planes and spaceships.
Organic creatures has evolved in symbiosis with the robots and now utilize them in their own futile conflicts! They have green, blue, or black hair with large, continously jiggling eyes. You aren't sure what they are, but it sure ain't human.