I guess pretty unlikely as WASM has been designed to be a generic engine which is embeddable in other contexts than Javascript as well. You can already import J

I guess pretty unlikely as WASM has been designed to be a generic engine which is embeddable in other contexts than Javascript as well. You can already import JS functions into WASM code, I guess the biggest hurdle for JS interop is that WASM only knows about ints and floats, but not arbitrary JS objects.