I think the most likely National Park name is 'Sequoia'.
For a mountain I fancy 'Klamath'.
Whatever they call the 'new' version it will still be Mavericks version 5, Yosemite v4, El Capitan v3, etc. as nothing much changes on the surface. Apple add a couple of 'new' features, change how a couple of useful features work, adding a new Intel CPU/chipset and a couple of new AMD graphics cards that are used in the latest iMac. This seems to be as big as it gets. Hopefully the next version of the Mac Pro and 'MacOS 2018' will offer something better, but I'm not expecting MacOS 10.13.X to be too different from what has gone before.
When you think about it what major change has happened to OS X since switched to Intel, ditching Atom & then 32bit processors? if you have a 64bit processor and a reasonable motherboard you should with a bit of thought and perseverance be able to run one or more of the OS X versions since Snow Leopard. I think they keep playing about with the guts of the software, i.e. USB ports and now power, just to keep the Hackintosh fraternity on their toes!