Scorponok robot mode. (some prequel spoilers)

I wanted to get some input on this.
I've seen it discussed that scorponok does not show a robot mode in the film.
Has it occurred to anyone that the scorpion mode might actually be his robot mode. supporting evidence would firstly be the fact that he transforms from a part of Blackout's alt mode. Scorponok's alt mode might simply be that portion of the helicopter. Secondly, in the prequel novel, scorponok is described as having a tail and pinchers and this is before he has ever been on earth. Could the body structure of his robot mode be more like a scorpion than a humanoid?
The second point is supported by the fact that bonecrusher is written with a stabbing tail on his back in the prequel. When he assumes an alt mode for earth, his robot mode keeps this attribute. Could we assume that bonecrusher would keep his tail weapon in robot mode no matter what his chosen alt mode?
The one thing that is clearly wierd about this theory is that it suggests that scorponok is already a scorpion before earth. But maybe hes just similar to a scorpion, and scans a scorpion on earth so he can alter his robot mode for the desert terrain.
Just speculating. I'm curious what people think of this.
I've seen it discussed that scorponok does not show a robot mode in the film.
Has it occurred to anyone that the scorpion mode might actually be his robot mode. supporting evidence would firstly be the fact that he transforms from a part of Blackout's alt mode. Scorponok's alt mode might simply be that portion of the helicopter. Secondly, in the prequel novel, scorponok is described as having a tail and pinchers and this is before he has ever been on earth. Could the body structure of his robot mode be more like a scorpion than a humanoid?
The second point is supported by the fact that bonecrusher is written with a stabbing tail on his back in the prequel. When he assumes an alt mode for earth, his robot mode keeps this attribute. Could we assume that bonecrusher would keep his tail weapon in robot mode no matter what his chosen alt mode?
The one thing that is clearly wierd about this theory is that it suggests that scorponok is already a scorpion before earth. But maybe hes just similar to a scorpion, and scans a scorpion on earth so he can alter his robot mode for the desert terrain.
Just speculating. I'm curious what people think of this.