Just a single image showing part of the large sedan's front end has been released so far, highlighted by the new model's LED daytime-running light signature. There also appears to be a very aggressive front intake nestled in a bold bumper, flanked by upright slits.
Powertrains should also be shared with the related Camry range, headlined by the 224kW 3.5-litre V6 and supplemented by a hybrid variant teaming a 2.5-litre four-cylinder petrol engine with an electric motor.
Reports from the US also speculate that the Avalon will be fitted with Toyota's latest Safety Sense driver-assistance technologies, including autonomous emergency braking (AEB) with pedestrian, blind-spot monitoring, adaptive cruise control, and lane-departure warning.
Stay tuned for our coverage of the 2018 Detroit motor show in January.