His eyes/mouth do in fact light up. There's an LED kit that fits into his backpack space and attaches through the back of his head using a dedicated on/off switch. Now for the kicker...Megatron is still green! I loved the green/black color scheme they gave him so much I upgraded it to a gunmetal silver with subtle sea-blue/green metallic shading, kinda like oxidization perhaps from sitting on the bottom of the ocean for so long. That coupled with lots of scuffs, oil splatters, and other metallic colors created the perfect color scheme. Now Megatron is ready to take on Prime once and for all!
Full set if pics here---> RotF Voyager Megatron