FWIW, cppfront would be the same, IMHO. It allows C++ syntax, and it just passes it through verbatim. Only transforms "syntax 2" into today's C++. And Herb Sutter very much says that what it does is based on the papers that he's presented for standardization, and that he'd like this approach (new syntax) land into today's C++ compilers and the standard.
cppfront is the only one that I thought had a chance till recently. The presentations from Sean Baxter seem to finally make the community see it on a positive light (I've seen posts on Reddit being removed on the premise of not being C++, which I think it's a bit unfair), so that's good.
Are you aware of the work of Douglas Crockford?