BMW M president Markus Flasch has confirmed that the new M3 will still be a driver's car, "very likely" to be offered in "both manual and automatic.” Here's a next-generation M3 testing on the Nürburgring, and it's a manual. Listen carefully - there's the telltale pause between shifts.
It's a good confirmation that a driver-focused version of the new M3 will happen. Expect it to come out in the next few years. The car matches the leaked photos of the car that BMW confirmed, which means the final car will probably look like this.