Canon announced the EOS-5Ds and EOS-5DsR 50MB sensor cameras in February 2015. However, Canon already has sensors with well over 100MB working in their labs for a few years.
They may replace the EOS-5Ds models next year with just one camera spotting a full frame sensor in the neighborhood of 75MB+
A bit earlier to have any reliable leaks yet but the simplification of having just one model to replace the EOS-5Ds cameras is welcome. Stay tuned for more information.