It couldnt be completely original of course, you'd have to piece it together from an existing set of limbs, torso, etc. That would be fully possible. And you dont really need to show the transformation in a very detailed way, so you could just have some blurry animation and "bam!" youre ready to roll out.
Btw, You're a 3D mojo maker, Oerwinde. Havent you designed any cool Transformers of your own?