Upload & Sell: Off
These are the ones next in line:
Sigma 24-70mm f/2 OS HSM
Sigma 300mm f/2.8 OS
Sigma 400mm f/2.8 OS
Sigma 500mm f/4 OS
Sigma 600mm f/4 OS
Sigma 135mm f/1.8 DG OS
Sigma 24mm f/1.4 DG
24-70 f/2 (FF of course) would be something really special.
With OS on top of that? Well, I think it's just wishful thinking, really.
There is not a single FF lens in existence that is faster than f2.8.
Adding OS would only increase difficulty and complexity in designing it.
That would be quite a technical feat, specially for a commercially viable price.
But I really hope they do make one, because I would definitely buy it!
A 135 f/1.8 with OS, now that would be another really special lens.
If they pull both of these off, canon and nikon can start to worry, IMHO.
That is also a big list. The supertelephotos should take them plenty of time (and €€€) in research and development. I don't see them realistically being able to release all of these lenses in a short time span, let's say a year's time.
I would be very happy to be proven wrong.