I imagine it would be difficult to compile a complete list of variants. There are also many "incidental" unintended variants (repackaging, minor re-tooling, unintended change in shading of plastic/paint colour, etc.)...Why did Canadian Slag have a red face? Was it intentional, or did someone just put the wrong colour plastic/dye in during production? There will inevitably be a number of people out there who will point out a "variant" that was missed. So, really, I wouldn't expect an ultimate complete list anyway. As awesome as it would be, it would require a lot of time, and I don't think there would be absolute certainty of completedness. I am really looking forward to these books! Definitely putting some $$ aside in anticipation.
Pre-orders soon?
