Will be posting this in both my megathreads since it is relevant to new playable races in general.
Awhile ago, Wowhead posted an article that on the official WoW website, the playable race pages have changed. The article shows off the differences between the old and new:
There isn’t too much out of the changes, but interesting to note is the layout in general changed again. It makes me wonder if it could be something they implement as a layout for future playable races, especially since this has happened more than once. Not that I take this as a hint of some coming soon, but still, it is interesting to note.
I’m guessing that new playable races may become pages of the expansion features section of whatever expansion they are released in on the official website. I’m sure they would be put on the official playable race page at some point, if not right when they would be announced.
If you want to see the official WoW playable race pages for yourself, you can see them here:
Plenty of room for new races in the future on there, of course! Also plenty of room on that character creation screen, too! 
