A 24MP D710 would be nice. On the DX side a 24 MP D400 with low light capabilites. I would sooo stop thinking about the D7100.
I'm not so sure the rumor is even close to being accurate. I mean, look at it this way: If you were Nikon, would you release a full frame right after you released a 810? It would be competing on so many levels. It just doesn't make sense to me.