Sorry, not a 250MP APS-H DSLR, but Canon have announced their intention of making a 120MP DSLR (presumably full frame). Hope that's enough pixels. "TOKYO, September 8, 2015—Canon Inc. announced today that it is developing a Cinema EOS System 8K camera and professional-use 8K reference display that will support the production of next-generation 8K video content, along with a still-image single-lens reflex camera equipped with a CMOS sensor featuring approximately 120 million effective pixels. Through the Company’s proprietary imaging technologies, Canon provides still and video input and output devices that will contribute to the development of imaging culture......Featuring a resolution of approximately 120 effective megapixels, the SLR camera now being developed will incorporate a Canon-developed high-pixel-density CMOS sensor within the current EOS-series platform, which will realize compatibility with the Company’s diverse interchangeable EF lens lineup" http://www.canon.com/news/2015/sep08e2.html No time frame given, but if the push behind the DSLR is 8K video, Canon won't be dragging their feet. They are really serious about being King of the Hill when it comes to video and they are likely to be funding this project pretty generously.