This is the Samsung NX lens roadmap for 2012. Five new lenses are listed, two for the first half and three for the second half of 2012:
Only the 12-24mm and 55mm pancake are ready to be released. The NX20 will be totally different then the NX10. Samsung is also working on a NX1 model (is this the Samsung NX1?).
The 2012 roadmap will be officially announced in January, 2012 (probably at CES).