Globe (Marble) and Mandelbrot are present in version 4.14 but not in any version 5 of kdeplasma-addons. Looking at the code in https://github.com/KDE/kdeplasma-addons/tree/KDE/4.14/wallpapers/marble, I wasn't sure how much the internals had been changed and if the old cpp code could still be compiled. Is this something that is planned to be ported?
I don't think this is going to happen, sorry. If it hasn't happened yet, it probably won't. :(
The marble wallpaper is included in marble now