What you're asking is a incredibly easy task. There are plenty of tutorials and people who would help you learn how to do it. Try it first before making a request of a simple task!
I know nothing about blender, so I'm not going to able to help you out with your Iktotchi problem. You need to scale down the body with your Kaminoan so it fits the slenderness of their body, though.
Overkill? No. But anims are very time consuming and annoying to get right. If you have the time and patience, I say go for it. If not, finish it and call it a day!
Bane is supposed to be 6'5 and probably at least 280 lb of muscle. So I'd actually like to see both versions, because I think the CW version does look cool, just doesn't look like how I imagined him.
I too prefer to see only Star Wars related things in a Star Wars game, but in all honesty it's pretty easy to avoid the stuff you don't like. Let's get back on topic and see if we can't find someone to fulfill this guy's requests!
I once started this using a mashup of different models that already existed. Not sure I'll get around to finishing it anytime soon, but this is what I have.