The new naming strategy of BMW will not say that the convertible that is based on the 3 series platform will discontinue. There will be a new one in the near future. It will get a hard folding roof instead of the rumors about a soft roof.
The engines in this convertible will be a range of petrol and for Europe diesel engines too, and hopefully there will be an M4 convertible too. The new 4 series convertible will compete against the Audi A5 convertible, cheaper E-class convertibles, more expensive versions of the Opel/Vauxhall Cascada and VW Eos and in the future against a C-class convertible too.