The US Navy is, like the RN, looking at both war time needs and future peace time needs. At this point, the building bolus of both the 2 Ocean Navy and then the war time supplements of 1941 and 1942 are either with the fleet or will likely be commissioned by the start of 1946 (with a few exceptions). Laying down new ships over the rest of 1944 and 1945 will likely mean that those ships will not be ready for combat operations while there is still a war going on. Therefore, the USN is doing a significant rethink of what the war time fleet needs and then what the peace time fleet should look like.
Ships expected to be completed by mid-1946
6 Wake Island CV-B (TTL Midway)
24 Essex class CV
3 Yorktown class CV
1 Lexington CV
1 Wasp CV
1 Ranger CVL
8 Independence CVL
Way too many CVE
The plan is for the entire fleet to be available for up to a year after the end of hostilities for return of forces to the US. However, by 1947, the Ranger, Wasp and Lexington will be disposed of. Lexington is beaten up and old and uses odd equipment for the propulsion train. She is big enough to be useful, but expensive as hell to maintain. Wasp and Ranger are too damn small and slow for current propeller driven aircraft much less jets. The 8 Independence class ships are war time expedients that are too small to be useful with jets. They are likely to go into reserve quickly and also sold/transferred to allies as needed. There will be some talk about converting them into trade protection carriers as they have a smaller crew than the Essexes, but way less endurance and capability. Several of the purpose built CVEs will be kept as interim ASW ships and several more will continue as aircraft transports (these may eventually be converted into LPHs). The rest of the CVEs, esp. the merchant conversions will be quickly disposed of in the most profitable way available.
Now onto the first line fleet carriers --- the core of the post-war fleet will be the half dozen Wake Islands. They will be supplemented by 8 Essex class ships, likely the long hulls with the least amount of war time wear and tear. One Essex will be in the active fleet as a test and technology demonstration carrier but will not be part of the deployable force. The rest of the Essex class will go into reserve/deep refits as technology evolves and rotate out of reserve to replace the active duty ships as they get deep refits. The USN is likely to keep the 3 Yorktowns in reserve for a few years, but the combination of very hard wartime use, damage and smaller size means that they will be razor blades by the early 50s.
As far as building plans, something like the USS United States class is highly likely to be in the shipbuilding plans for the late 40s. The USN won't have a reliable nuclear delivery system on its current carrier force for a while until the bombs shrink in size, so a big carrier is needed from internal interservice politics perspective. There will be talk about another light-ish carrier class (still might be 40,000 tons) as an economy carrier to perform CAP and ASW roles for the battle and nuclear strike carriers, but at this time, not a penny has been allocated to those design studies.
Now onto battleships --- the Big-5 standards going to reserve, pretty much everything else is getting razorbladed or becoming a test ship.
2 North Carolinas -- reserve
3 South Dakota -- deep reserve
3 Iowas -- active service
2 Alaskas --- deep reserve
The USN is still thinking if they need a big carrier body guard cruiser/light battleship and they've allocated half a dozen FTEs to do a design/requirement scoping study.