Mazda Motor Corp. will unveil an SUV/crossover concept at next month's Frankfurt auto show that may preview a variant of an existing nameplate or an update of the aging CX-9 crossover. Dubbed the Koeru, the concept showcases the latest embodiment of the Mazda brand’s muscular Kodo design language. The design aims to impart “the power and vitality of a wild animal while maintaining a sense of refined dignity,” Mazda said in a statement Friday.