No, we know what the status of the O-I was through surviving documents. There is nothing supporting that any part of the To-Ku left the design stage.
I dont see why not if half of the russian navy that is already in game are never finished or just designed things and they plan on adding more like that.
Only the Kronshtadt and the Shherbakov are anywhere near what you’re describing, the former remaining merely a plan and the latter being incomplete. However, both Italy and and Germany, alone, have more incomplete ships than Russia; namely the RN Comandante Margottini, the RN Etna, the RN Conte di Cavour, the Z 46, the Z 47, and the SMS Saschen which were all never completed.
Panther II… XP-38G
Both removed due to not being real. They can’t be used as examples.
E-100
The hull was completed, albeit the Tiger-Maus idea was merely a proposal and the E-100 chassis wouldn’t have been actually capable of carrying the Maus turret without overloading.
then a lot of the chinese stuff
What Chinese stuff? Only the 1221 (Object 122MT) could classify as anywhere near “paper,” because Gaijin is stupid and gave it missiles even though the entire purpose of the 1221 was to make a cheaper and more affordable version of the 122, which involved welding over the missile mounts to make them unusable.
The other Chinese stuff that can be pointed out, namely their T-26s, the T-34-76, and the M36; are only wrong because Gaijin took the lazy route and just copy-pasted the existing in-game models rather than giving them the accurate T-26 model 1933 and 1936, or the M36B2 instead of the M36. The T-34-76 is utter fiction, though, China never received any. They received exclusively T-34-85. The myth seems to originate from China having been the intermediary between the Soviet Union and North Korea when sending military equipment, one of which were T-34-76s (though model 1943 instead of 1942).