Quick update: As noted before, the anime will feature 40 ship-girls (kanmusus) with with episodes dedicated to Destroyer Division 6, the Kongou class battleships and Yamato. Added to the list of confirmed ship-girls are Hiei (BB) and Ooyoda (CL) which leaves 18 more to go. Also, there will be an admiral (teitoku), but he won’t be shown on screen. Ooyoda will most likely function as an on-screen substitute (e.g. secretary) for the admiral as needed.
FYI, the KanColle Primer has been updated with all released official character images (currently 22 total).