>>1. Compatibility with the MB-D10 grip >>2. Compatibility with the EN-EL3e battery > >Is it likely that anything Nikon releases will be compatible >with either of these? I assumed, granted without giving it >much thought, that the new, higher capacity battery, would be >a given in any new camera coming from Nikon.
No-one knows, really. One precedent was the introduction of the EN-EL3e battery with the D80 and D200 - in that case the new battery was compatible with older cameras (although the new cameras only work with the new battery).