I absolutely love the Iowas, and would love to see Iowa and Wisconsin reactivated. But...
I refer you to "A Glimpse of Hell" by Charles Thompson, the book on the Iowa turret explosion. These ships have problems. Most of the money spent on them in the 80's was in electronics and weapons. They will need massive work on powerplants and general infrastructure (wiring, etc). I personally think its worth the billions it will take (and it will be billions), but others may not agree. They are also very manpower intensive. Where will we get experienced BTs and Gunners Mates? They had to get retired WWII, Korea, and VN gunners to train the kids in the 80's. A lot of information on practical 16" gunnery was passed on orally and those guys are largely dead now.
Also, new powder will have to be made, as the poor storage and blending of powder lots has effectively ruined the existing stock. That's why the New Jersey couldn't hit a dang thing in Lebanon in '84.
A study done in the early 80's when they were upgraded found that an Iowa can put more ordinance on a target faster, cheaper, and with less risk than a carrier alfa strike. This may no longer be true, perhaps the airedales can enlighten us?
No doubt the USMC will push for them hard again,like they did in the 80's, since there are no other real NGFS platforms left. But the old WWII rocket barge idea might be a cheaper way to go.
Again, I hope to see them back in commission, but it will take a real committment by the navy, and I don't really see that happening in the current political climate.