Poking around the non-U.S. Amazon sites, I found a listing for the upcoming Black Series Clone Wars Clone Trooper from Wave 27. The descriptive text specifically calls out this clone trooper as being of the Phase I design:

The Black Series 6-inch figure is carefully crafted to resemble the Phase I Clone Trooper character from Star Wars: The Clone Wars, plus features details and multiple points of articulation.

Now, Amazon text has been wrong before but looking at some of the other Amazon listings for Luke (Endor) and Leia (Endor), this text seems to be indicative for what we may be getting for the clone. Hopefully we can get better confirmation soon.