The successor of Sony NEX-7 will be the only interchangeable camera from Sony in 2013. And the name will not be NEX-7N(which is rumored before).
The NEX-7 successor will have a lot of change from NEX-7. The announcement should in Summer, and will be available in October 2013.
Some Specs of NEX-7 successor:
- no AA filter
- new JPEG engine