Latest rumor from Sony Alpha rumors - A/E FF Mirrorless

According to Michael Reichmann from Luminuos Lanscape "Sigma undoubtedly knows, within the next 18 months one of the major sensor and camera makers is going to release an advanced multi-layer sensor which bypasses the Foveon patents, and at that point if Sigma hasn't re-established a competitive and refreshed X3 camera line the chances of success for future Sigma cameras are much diminished".

That's sound to me like SONY. I doubth is going to be Canon, although it can be Fuji.