Please tell me space black/grey will be an option!?
I have heard nothing about this yet. Sorry! (But I guess there is no reason why that band couldn't get a black coating at a later point. It has happened with other third party link bands too.)
The main concern for manufacturers is always to sell to the part of the market that is the easiest to produce for and has most customers. So while there are probably quite a few more Sport versions of the watch out there the stainless steel finish is just much easier to achieve for manufacturers. After that there's often another take on the available colors and once the market is saturated I'm pretty confident someone will start to investigate how to achieve a finish that actually resembles the 7000 aluminum too.
So I would feel rather confident. Things just take a little time to get off the ground.