Latest rumors suggest that Samsung going to announce the NX400 mirrorless at the CP+ 2015 show. CP+ or comprehensive camera and photo imaging show is the international show where camera and imaging companies present the latest products and technologies.
It is also rumored that Samsung engineers are working hard to make the announcement possible. Though this is not confirmed news, but we hope to see the camera beginning of the next year.
NX400 camera will feature a NX1 sensor and also bring in 4K recording.