Comparing the 7100 specs against the rumoured specs of the 7DMKII, Nikon will have to release something a little bit higher because as it stands, the 7DMKII will beat it on all specs.
Since the price difference is estimated to be $1,000, and looking at the specs, the 7100 has got to be just competition for the 70D.
But since Nikon showed their cards first, I bet they wont show the D400 until after the 7DMKII is out so they can try and trump Canon.