The 300 Series Land Cruiser will likely drop the V8 engine
Reports have the Land Cruiser ditching its gas-quaffing 5.7-liter V8 for more efficient powertrains. The base engine will probably be Toyota's twin-turbo 3.5-liter V6 as found in the Lexus LS, with an eventual hybrid edition. Those should be paired with a 10-speed automatic.
The 300 Series should be built on Toyota's new TNGA truck platform, which will likely also underpin the new 2022 Tundra and the next 4Runner. Australians may get diesel versions but don't expect them to come stateside.