I have a feeling the Cyberman would just act as inspiration for more Doctor Who fanfic erotica, and there is already far too much of that in existence. Slitheen x Cybermen, plz no.

On a more relevant note, these are pretty awesome - someone should try doing Iron Man. I'd contribute if I had any artistic ability whatsoever, but I know I don't, considering my attempts to lrn2art have generally resulted in mannish tears of frustration and many a broken pencil.