It's going to come down to exactly how x86 emulation is provided.

If apple extends rosetta 2 to provide support to the hypervisor framework, then conceptually yes, you will be able to have intel OSX guests in Fusion on apple silicon.

If that's not the case, and Fusion only provide ARM virtualization, and windows ARM is what provides the x86 emulation for windows x86 apps, then no.

I doubt that VMWare will write an x86 emulator, but we'll see.