Post Treaty I might build one or two small Vanguards (say 8x15", 32kts, 12" belt, 35,000 tons) or another similar size ship I have laying around with 12x13.5".
Quite true...once the useful life of P.R. (isn't she due for a rebuild in the 1933-1934 timeframe?) runs out, her turrets might be useful for a LLC type vessel...
She's due for one and she'll get it in 1933. But I dont intend to use her turrents for new ships. The 13.5"version would have quadruple turrents, like a bigger Stratsbourg or smaller KGV.
In terms of future battleship construction, I suppose it will be deturmined by who makes the move first, or if said construction is to counter something that already exists.