SonyAlphaRumors got realiable info about the next two Full Frame sensors that will go on market in 2019:
Sensor 1:
60MP
16 channels (which is crazy, normally it should be 8),
4.6FPS@16bit
12FPS@14bit
8k30P@12bit
8K60p@10bit
4k60p@12bit
FHD300P@10bit–Sensor 2:36MP
10FPS@16bit
60FPS@10bit
on-chip PDAF
These sensors can be bought by any company. I guess Pentax will use them first and maybe Nikon later. I doubt Canon will use them as this would mean they would have to give up their whole sensor department :)