The title is rumoured as a PS2-on-PS4 release.
— Wario64 (@Wario64) September 12, 2016
The game is priced at 22.95 AUD which is around £13, with a release date of September 13. However, nothing has materialised in the store as of yet.
If the title is indeed coming to PS4, it looks like a PS2-on-PS4 release, so don't expect any improvements to the game or its graphics.
The listing may have gone up earlier than intended but with the supposed release date upon us, we haven't heard a peep about it.
Stay tuned for further updates.