I'm not really feeling any kind of Marauder Megatron vibe from this one. It also seems like it may need a bit of finishing to make the alt modes look a little more cohesive.
Nicely painted, but the alt mode doesn't look like anything, except a half transformed...thing. Sorry.
Those shoulder pads make great hips in the torso mode. Alt modes work pretty well too. Are you going to cover the foot ball joints in bot mode? I'm guessing the shoulders are styrene. Looking forward to paint.
Needs actual treads, more filler in both alt modes to flesh them out, and a paint job. After that, this has potential to be amaxing.