Concept art for Thrawn's ship in Ahsoka shown at the San Diego Comic-Con

Compared to the couple live-action shots from the trailer:

[Image descriptions: first image is a large command deck built with a heavy emphasis on gold and curving forms. Golden humanoid droids stand at four stations, looking at circular screens. The second and third images are of the same command deck, less ornate than the concept art, the second with Thrawn and the third with Magistrate Morgan Elsbeth.]