BMW is readying the next generation of the gas-powered BMW M3, which has been spied testing at the Nürburgring in Germany.The M3 will continue to offer a turbocharged six-cylinder engine, although BMW is also launching an electric M3 in the near future.The gas-powered model will adopt the smooth Neue Klasse styling seen on the electric i3 sedan, but has different proportions with a much longer hood.