Thanks to Yakface, it now looks like there will be four new Star Wars Black Series figures releasing for The Clone Wars, in particular, the Siege of Mandalore arch for the show final season.
The information was scraped from Walmart’s DB, so it’s probably legit. As you can see below, there will be the following figures: 332nd Clone Trooper, a Mauldalorian, a Nite Owl Mando, and a new Ahsoka.

One would hope that the Mauldalorian and Nite Owl figures are actual characters and not generics, because it would be solid to get Gar Saxon, Wren, or Katan. At this time this is all the information out there, so hopefully there will be a full reveal later this year to confirm the leak.