One of my favorite SW books was the improbably awesome Yoda: Dark Rendezvous. Without ruining it (in case you haven't read), I'll just say that there's a great moment in the story where somebody important thinks "OMG...what if kind little Yoda was evil? What if he did go to the Dark Side? What would such a creature be like?" He would be a far bigger threat than Sidious, of course. Yoda would win. This is actually an older illustration that I recently pulled out and spiffed up...just because it always struck me as chilling. Hope you like it.