The trailer appeared on Toyota Mexio's Twitter page, and was swiftly taken down again - but not before it could be reuploaded to YouTube by fans eager for the Mk V Supra.
The video shows the car from all angles, revealing that the design of the 2019 Supra is, as expected, substantially in line with the previously seen concepts and prototypes. Some of the excesses of the FT-1 and Supra Racing concept cars substantially pared back, but the car retains its distinctive, sporty look.
According a title card at the end of the clip, the car will be called the Toyota GR Supra, a nod to Gazoo Racing, the firm's sporting division which has both produced road cars such as the Yaris GRMN and runs the firm's World Rally Championship team.
Previously - as part of an official teaser campaign - a video had been released revealing the note of the Supra's 3.0-litre straight six engine.
The short video on Toyota Europe's YouTube page also featured blurred action of the Porsche Cayman rival in action, but the focus was on showcasing the sound of the BMW-derived engine. Toyota described it as highlighting "the sound of its harmonious song."
The latest leaks follow on from an earlier detailed shot of the Supra's front end, taken when the car was on a transporter, published on forum dedicated to the new car and in our gallery above.
Deliveries of the new sports car will begin soon after the Detroit reveal, Toyota has confirmed, with the first cars due to be seen in the first half of next year.
The Supra name will be back on a Toyota sports car for first time since 2002, development of this model having taken place alongside the new BMW Z4. Development started in 2012 as one of a series of projects between Toyota and BMW.
Power comes from a BMW-sourced 3.0-litre straight-six engine with around 340bhp and 350lb ft. Drive is sent to the rear wheels through an eight-speed ZF automatic transmission.
The Supra, which also features a BMW M Active limited-slip differential, weighs around 1500kg and has a 50:50 weight distribution, its body constructed of a blend of steel and aluminium.