What do you think will be in the C70 Mark II?

My son is in film school and currently has a C70, along with an RF 28-70/2 and a 24-105/2.8 with zoom motor.

He's currently leaning towards putting his funds this year towards the rumored 70-200/2.8 Z, but when I mentioned that there's a rumored C70 Mark II that will be announced towards the end of the year, he wondered out loud how Canon would improve it.

Realistically, what improvements do you think the C70 II will have? My best guess is improved dynamic range, but I'm not a video shooter so I wouldn't really know.