Well... the Type R will be in the 5 door hatch model, which is only produced in the UK plant. So in my opinion, you're looking at body style close to what's already in production. Especially with the first 10th gen base models hitting dealers this Fall. But knowing Honda's recent concept to production models, I'd say the coupe and sedan Si's aren't far off from what we saw at the auto show.
I'm a hatch guy though, regardless if I end up Si or R, it'll be the 5 door hatch model.