Quoting Ben Sandfelder
Yeah...My friend tried to build a scale Kraid... The head alone was the size of my fist. It's a shame he couldn't finish the body.
Any pictures? I think ANYTHING that... rotund... would be difficult to build in Lego. I think that even getting the head done, and doing it well, would be an amazing feat. The 8bit one, on the other hand, is a bit smaller and a fair bit easier to work with; not much detail, all that can be fairly said is that he's just about rectangular.