I saw the coverage on the A7 Mk II earlier today, it looks like a solid upgrade. I hope the IBIS works with adapted lenses, that would be pretty awesome. They left the form factor mostly alone except for some welcome improvements too, which is nice to see. I'll have to hold one to see if it actually helps, but the existing front dial is horribly uncomfortable for me and the new front dial looks better. And an extra Fn button is always welcome!
On the lens front, that 28mm f/2 + 21mm WA adapter is very interesting. This is also purely an educated guess, but with the size of that 35mm f/1.4 I bet they're optically correcting a lot and it's going to be a heck of a performer.