They only place left for them to do anything new is the club space though, right? I could easily see it happening, but at the same time they rent out that area frequently for private events.
The rest of CityWalk has been pretty much completely redone or is a space that is popular.
I could see the fast food spots changing. It just depends on how they'd want to change it.
But yeah, outside of a few things, I can't see much happening left for Citywalk, and that development after 2020 goes more for Development south of the property, and that it'd include a new complex similar to Citywalk as it stands now.