It'll most likely be 36-40 mpx, stacked CMOS, no LPF(hopefully), 30 fps 12bit compressed, 20 fps lossless 14bit - just like the Sony a1.
The biggest thing/hope for me is the AF in video getting as good as the Photo AF, so again, hopefully, the QP will answer that prayer:)
85mpx GS in 10 years...