Definitely barely founded speculation ahead:
Lucrehulk huge ship (art and pdic non huge ship)
Republic flotilla (ven title)
Republic raid squad (wollfe)
Separtist adept/force user squadrons (hot landing in the indivisible hand pack)
Republic gozantis (venator box art)
Anything else?
The Artwork for the Providence Carrier-Variant also spoils Republic Z-95 Headhunters in the bottom right corner and LAATs in the top left corner.