Let's pretend we live in a world where the Frontier is coming back. What new facility types can you think of? Post functionality and the building description.

Getting the obvious out of the way with an inverse battle style clone of the tower. Perhaps make the facility itself a reverse tower that goes underground with it being used to study the core of the earth on the side lore wise. Maybe make Colress the big boss with him being the one to upgrade the inverse machine to work all the time (in ORAS the excuse there is that it can only handle one battle a day) and wanting to study how trainers work with their Pokemon in extreme circumstances.