Although the JDM model's specs are already firmed up and the vehicle is currently on sale in Japan, there is no information about what could be lost in translation on the trek across the Pacific. We'd expect the aero enhancements to remain unscathed, along with the additional welds, reinforcement panels and bars. The Bridgestone Potenza RE-01Rs that are fitted onto the JDM version are also sold here in the US, so hopefully they will remain and be wrapped around a set of custom, lightweight rollers, possibly sourced from Rays Engineering (who Nissan has tapped in the past) or another premium wheels manufacturer.
We'll be on hand for the official unveiling in Detroit, but in the meantime, feel free to ogle the gallery of the new
[Sources: Straightline, Nissan]