this is the only thing close to what a modern battleship we will have
if i had the shape design of this i will modify it with us navy electronics and give it armor similar in thickness to a deutschland-class pocket battleship but with an all or nothing armor scheme and the armor will be composit or chobham the ship will have 6 254mm guns in 2 triple turrets and will use mark 41 vls launchers at the stern around 160 cells and an additional 90 cells forward replacing the s-300 launchers and will have the aegis combat system and will have 8 30mm goalkeepers as it's ciws
modification 2
the same but more missiles but the gun layout will be similar to kirov but with two ak-130's instead of two ak-100's and their will be use of f-35b's as recon and own air squadron (but will only carry 3 of them as the stern and hangar will be modified to carry more than one as the aft of the ship will be raised to level with the hull to add the additional hangar space) and will replace the CONAS (combined nuclear and steam) layout with COSAG (combined steam and gas) the place where the former russian radars located at is gonna have antennas from ticonderoga's to take their place
Note: how will you modify and improve the design and upgrade it to make it a threat to aircraft carriers