Oh man i didn't think about that.I'm scared any introduction of the new path system would break every single save file knowing how buggy the last few updates have been. I think we could see some things like the foliage and decorations around the aquatic theme as that could tie in with a coastal / general zookeepers pack but major features like the water and paths are likely key features of a second game (if it ever comes).
If last pack turns out to be just a coastal pack, even with pelican and all, i Will honestly loose it.