If the hundreds of spy shots, juicy rumors, and shocking leaked photos haven't tipped you off already, the new BMW M3 sedan and M4 coupe will debut next week. But before we see the 2021 BMW M3 and M4 on Wednesday September 23, the company wanted put out one final teaser to get fans riled up. Published to Facebook by BMW's Australian division, these smokey images reveal our first solid glimpse of the M3's vivid new launch color, expected to be called "Isle of Man Green" after the British island that plays host to the annual Isle of Man TT motorcycle races.

The teaser images come with the tagline, "Endless rumours. Endless power. Speculation ends September 23." Some of the photos are completely obscured by smoke, but others offer up small glimpses of the headlights, grille, and hood. Another image shows a highly obscured view of the rear, showing a European license plate.

BMW has long had a penchant for debuting the M3 and M4 in bold, unusual colors. The E46 generation M3 launched in Laguna Seca Blue and Phoenix Yellow, for example, and although the E90 generation took a brief hiatus without a flashy launch color, the F80 models brought back the tradition with Yas Marina Blue and Austin Yellow. Judging by these teaser images, Isle of Man Green is a deep color with plenty of metallic flake.

BMW will also offer the cars in Alpine White, Black Sapphire, Dravit Grey, Portimao Blue, Tanzanite Blue, Sao Paolo Yellow, and Toronto Red. We expect the M4 to wear a different launch color than the M3 - most likely Sao Paolo Yellow.

Both cars are expected to be powered by BMW's 3.0-liter twin-turbocharged S58 inline-six engine, producing 473 horsepower in base guise or 503 hp in the Competition models. Expect a manual transmission only on the base cars, while the Competition cars should be offered exclusively with an eight-speed automatic transmission with standard all-wheel drive.

Following next week's reveal, the 2021 M3 and M4 should arrive at US dealerships sometime next year.