Well from the anime we have:
Ise class (Hyuuga) Kongo class (Kongo, Hiei, Haruna, Hirishima) Myoko class (Myoko, Haguro, Ashigara, Nachi) Atago class (Takao, Maya) Yamato class (Yamato, Musashi) Nagara class (Nagara, Natori, Yura) Fletcher class (Melvin) Set-toku class (I-400, I-401, I-402) Type IXD2 U-Boat (I-501)
From the manga we also have:
Atago class (Atago) Ise class (Ise) Bismarck class (Bismarck) Lexington class (Lexington) Nagato class (Nagato) V-W class (Vampire) Renown class (Repulse) Type XXI U-Boat (U-2501) Kagerou class (Yukikaze) Shokaku class (Zuikaku)
Judging by how the initial ships we're made, i guess only the anime one are going to be implemented.