Always a possibility with any distro, but the tooling around it is flexible and repeatable. If another group of people wanted to continue off where they left off it would be far more possible than a lot of the Ubuntu forks.

Just need the Atomic Fedora base to still be around and everything else is already pre-setup to run on GitHub infrastructure neither of which I anticipate going away soon. (Famous last words)

Calling it a superset of Fedora rather than just being its own bespoke distro can be a fine line, but really there's nothing stopping anyone from forking it and continuing on, a good few people run their own forks already to meet their own needs a bit more specifically.