According to the report, the wireless guitar's electronics are contained within the neck, leaving the body wings free to be detached and replaced with alternate, possibly even sillier designs. The default guitar (seen above) is only the beginning, with an "axe" design (after the break) set to become available exclusively through pre-order at Gamestop. Wouldn't that be the perfect last-minute addition to your Fellowship of the Ring theme band?
Source -- GameAxis
Source -- Gizmodo