As others have said, I wouldn't read too much into this image as to the direction of the adaptation; they might have just decided on this as his iconic "Black Swordsman" uniform for the duration, though it's worth noting at the end of the third movie he's wearing something more resembling his initial Black Swordsman gear.
Anyway, here's hoping they don't skip the original BS arc. If they're sticking to the film format and want to do something reasonable and fitting the mold of the previous trilogy they should do another one of Black Swordsman, Lost Children, and Conviction, ending with the incarnation ceremony this time. Of course, who knows, but otherwise I sure wouldn't mind them doing things as drastically different as possible from their previous effort. It could be a TV show or OVA attempting to span far more territory or a just one film focused on one part (I agree with DK on an OVA, I think it has the best potential to do something worthwhile).
We'll see, but I must say, as I complained recently, at least they're animating parts of the story that weren't done previously, so I'm excited on that count at least, and even though I certainly didn't like the new anime movies, at least this venture hasn't ended on that sour note as a complete crash and burn and something more, and hopefully better, will come of it.