Easy, it is just a matter of creating a compiler backend for Java, Flash, Silverlight that target WebAssembly instead of their original bytecodes, then bundle it with their own runtime compiled via emscripten.
There are already a few projects doing exactly that.
One could even create a ActiveX compliant library, that via emscripten would be able to target WebAssembly.
There are already a few projects doing exactly that.
One could even create a ActiveX compliant library, that via emscripten would be able to target WebAssembly.