Do I ever think that battleships would be useful!
All four Iowas have only been in active service for a fraction of their lives; they are quite young for ships - Ticonderoga is older operationally than any of the Iowas.
They were all bought back into service and modernized in the 1980s, and then decommissioned with perverse haste and glee by the Navy from 1990 onwards. There is a great chance that they would have been scrapped, just so they could not raise their heads again.
But, Congressional order means that two must be kept on the Navy Register as Class 2 Mobilization assets until such assets are in service that replace their capabilities. With the cancellation of the DD-21, this will be a while.
Further, such statements as "they are thing of the past...way too expensive toys...useful only for bombardment" are rather simplistic, and do not see important parts of the issue.
There is a big gap in NGFS present in the USN to this day; 5" guns simply do not have the range or punch. Nor can the platforms they are on go right on in to surf city, as they are too expensive, and bereft of passive protection - armour.
Armour, of which there is over a foot thick of on the Iowas.
A 5" projectile cannot be compared with a 16" projectile.
As for range, there was work done in the late 1980s/early 1990s on an 11" extended range sabot round that could be fired from a battleship gun up to 100nm away.
More modernization work could be done, giving more missile capability than the current 32 Tomahawks in ABLs and 16 Harpoons; transforming these very well armoured and fast (35 knots) platforms into BBGs - guided missile battleships.
They aren't a Tico or an Arleigh Burke, but they would complement those vessels in a very impressive manner.
They are designed for flagship ops - the current command vessels used as fleet flagships are unarmoured and virtually unarmed. They have room for hospital, storage and forge facilities.
There is a lot of information on Warships of the World, Battleships.org, and most of all
http://www.usnfsa.com/index-new.htm
Do have a read and think some before making hasty judgements, and calling things expensive toys.
As for their utility in the current conflict, as well as launching Tomahawks, they would be able to provide heavy NGFS for actions such as the taking of the port of Umm Qasr, and fighting near Basra. And battleship gunfire fits right into the very definition of "shock and awe".
Never say never.