Seems that the only way to get a drop-top M2 is to cut the roof off of the coupe yourself.
Just this week, leaked images of a convertible BMW M2 were released. These images confused a lot of people, including us. It was thought that a convertible version of the M2 wouldn't really make sense, so we were still skeptical. BMW Blog was also skeptical, and decided to reach out to sources at BMW who claimed that no M2 convertible is in the works. The company may be preparing an M2 GTS or CSL, but a drop-top is not going to happen. Even the M2's chief engineer Frank Isenberg denied the convertible rumors.
Isenberg said, "there will not be an M2 Convertible. We need to keep it as purist as we did with the 1 Series M Coupe." He went on to say that "We've got such a nice M235i Convertible. And convertibles are not for racetracks, they're for cruising." We don't think that a convertible M2 makes any sense. The car is meant for enthusiasts, who typically prefer lighter coupe models. We hope that these rumors die down so that we can focus on the exciting prospect of a track-focused M2 GTS.