Well Adorama accidentally leaked the R1 specs. Gist of it was 30mp, 240fps and a dual sensitivity sensor similar to their cinema products which promises 16 stops of dynamic range.

Which slightly makes up for the not surprising 30mp sensor. But with so much horse power. I'd much rather see 45mp sensor to shoot 8k and just have more cropping ability or high resolution for my 42" printer.

But, I'm gonna reserve full judgement on the body till it is out. I am considering buying it. But it really has to impress to make up for lack of resolution. Else the R5 II seems like the obvious choice for anyone other than extreme speed junkies.