Samsung released a new PDF document (download here) describing some of their future goals. On page 17 you can read about the launch of a new ASP-C sensor for their mirrorless system. There is no word on specs yet. P.S.: Notice the absence of any Full Frame sensor hint (found via Photorumors).
And Samyang announced that all their lenses will be available in X-mount (found via Fujirumors).