That’s a purely hypothetical situation. Even in that case a court would very likely uphold the license just by the name. For what it’s worth plenty of software

That’s a purely hypothetical situation. Even in that case a court would very likely uphold the license just by the name. For what it’s worth plenty of software is only referencing a license by name or reference and I’m sure you are using that software as if that license were there in hardcopy. More importantly if you want to make a fork you can always retain that license the moment you fork, not the moment the license swaps. In fact you probably would want to start collecting contributions under Apache 2 straightaway.