DM has to go to the Styrian government to seek permissions to use the old portion of the track. I also imagine he would have to seek permission if the plan was to make significant changes to the environment (like the proposed ring extension from 2005 posted above) and I'm not sure how open the government would be to that.
I'm guessing if anything happens it will be adding the old west side layout with a change to the old Tirok Kurve entry to add another passing zone and to cut down speeds through that portion of the track. I would like to see them just add the old west side and leave it as it was but not sure if that would fly on the grounds of safety anymore.
This is an idea I had.
Also want to add I think any of the posted layouts in the thread would be great. I really like the RB Ring I just wish the lap was a bit longer. It is such a beautiful location and I think seeing a little more of it would be great.