I assume you mean Rudd and Gillard all over again.It could take a decade or more to implement any of the findings from the review. If the review does support the already expressed government view that we need a bigger fleet made up of smaller ships then all that does is trigger another review to determine exactly what capabilities will be required from this new ship. Once that is determined then you have go through the tendering stage which would take several years. Then you go though the contract phase and so on. All this before you even get to the construction stage.
Of course if there is a change of government or even a change in leadership of the current government you could see all that work thrown out.
When Albo is deposed as PM after the voice referendum fails (yes I am tipping that) you could see a complete change of policy from his successor.
Nothing is written in stone. Until the Champaign bottle is cracked against the bow of any new ship I remain sceptical as to the outcome of any review being delivered.