The question now becomes, will the M2 get an S55 variant that is detuned (as in a real M motor) or just the same N55 that is under the hood of the M235i with some software changes to boost output into the ~375 horse range? Considering BMW prefers to take the path of least resistance these days re-using the N55 means maximum profit with minimal expense. It also means the M2 will not have a real M motor and in the opinion of BimmerBoost not be a real M car just like the E82 1M. That would make it an M235i with a limited slip differential standard, a body kit, M3/M4 suspension bits, different software, and an M badge paired to an inflated sticker price.
This car will essentially be the new E82 1M and it will be interesting to see if BMW gives this vehicle a DCT transmission. A manual is practically a certainty.
More details to come as they become available but the 2016 M2 is on the way.