There is a version of W968 with Fang Bo handle. You can buy it at Prott now. Plus, unless you believe that the CNT uses exactly the same equipment as the general public buys for £30, Fang Bo uses one. Remember, FB used to use W968 with a picture of Ma Long in the handle, same as HL5, until he got his "own" blade. It's only a matter of time before FZD gets his own version, with his picture, possibly the one shown in the stills, in the handle. My bet is that he goes with a version of N301 though.
So, no, you cannot easily tell from a picture that the version used in the German Open is a W968, but it is highly unlikely that it is a commercial FB2.
Incidentally, with all the fuss about FZD losing at the German Open, he did come very close to beating Dima, while using a strange bat. Who wants to make bets about how well he will do with it as he becomes more familiar with it?
Personally, I think all of the current changes are at least in part to do with rebuilding in the run up to Tokyo 2020.