The last time we saw it, BMW still had some unfinished-looking headlights to stand in for the production units. Now it looks like it's sporting the cool-looking LED headlights off the new 3 Series. Like before, we see the slightly flared fenders to accommodate the M3's wider track. A quad exhaust juts prominently out back in proper M-car fashion. There are different wheels on this prototype than before that allow us to get a better look at the massive brakes. They don't appear to be the carbon ceramic discs with gold calipers on offer for the current M3, but we're sure BMW won't be dropping that option for this next generation.
Its taillights are still heavily disguised, and BMW hasn't removed much camouflage compared to before, except for the hood. There's every chance that this isn't the production hood on this car, but it's definitely slightly different from the current M3 — the raised section in the center doesn't appear as prominent or as snarly as before.
Now that the 2019 3 Series has been totally outed, it's safe to assume we won't have to wait much longer for the next M3 too. Early next year could be optimistic, but we hope it's coming sooner rather than later.