“Battleship” is a hard sell, politically. No one builds battleships anymore!
The Zumwalt is, in fact, basically a pocket battleship. It is multi-role, but land attack is a major focus. Imagine the USS New Jersey standing offshore from Lebanon in 1983 pounding the hills around Beirut. That’s pretty much what the Zumwalt would do.
And, of course, the railgun (which I don’t think is installed yet) would add to the capability.
Destroyers are not normally for “power projection” but I think the Zumwalt is.
Imagine the USS Zumwalt standing offshore being sunk by a Chinese or Iranian SSK. Thats pretty much what the Zumwalt would do.
I was thinking more a battle cruiser, given the lack of armor.