Hopefully new event battleships and for the first time event carriers would be available by christmas. Here is my suggestions should be for both the battleships and carriers for the British, American, German and Japanese Navies. Not sure what to give to the other navies

EBB4
US: Washington (North Carolina class hull with South Dakoda class Superstructure)
UK: Duke of York (King George V class) (Note:I perfer this over the Hood Refit)
IJN: Mutsu (Nagato class)
KM: Tripitz (Bismark class) (Note: the KM already have a tier 3 ship (OII 1942) as an event Battleship and there is a Tripitz ingame but it is a rental and almost nobody uses rentals)

EBB5
US:   Missouri (Iowa class)
UK: Temeraire (Lion 1 class)
IJN: Musashi (Yamato)
KM: H-41 (H-39) (Note: I wanted the H-41 to be equal in tier with the rest of the other nation event battleships thats why i moved it from EBB4 to EBB5

ECV
US: USS Enterprise (Yorktown)
UK: HMS Victorious
IJN: Soryu (the Hiryu was a modified sister ship)
KM: Note sre maybe the Aqulia an Italian carrier that was never completed and was seized by the germans after the Italian surrender