yes, it seems Canon is still testing different approaches and final product is still many months out.
if launch were "imminent" (=2018), then at least mount decision (EF only, new "slim" mount only, or both) would have leaked by now. it is such a juicy bit of info that somebody would have broken an nda.
Nikon single card slot was juicy too but it wasn't leak until 1-2 days of the announcement. If that was leak, there would be probably little hype around it.