The only thing sarcastic is the ripping a hole in space time continuum. Otherwise, it would be a tremendously amusing accomplishment if Wine could run the Windows Subsystem for Linux.
Well, why isn't it possible to emulate just ntoskrnl, just like WSL does with the Linux kernel?
Granted, it would require people to have a valid Windows license and install media (because you can't redistribute Windows binaries), but I don't see any major problem.
Isn't the license concern pretty major though? IIRC even in the current form Wine at the early age had been quite controversial, due to legal concerns. They consciously prevented those who have knowledge of Windows internals from contributing to it just to make sure it's a clean room implementation.
IANAL, but doesn't OpenJDK basically do the same (implement documented API interfaces) with Sun's Java? And the Windows syscalls are IIRC also publically documented...