"Toy-Con Motorbike: Insert each Joy-Con into an assembled set of handlebars to drive a motorbike on the
Nintendo Switch screen. Pressing the ignition button starts the engine, while twisting the right handle activates the throttle. Leaning your body or turning the handlebars left and right controls the motorbike."
Based on the provided description, this image shown at the top of the announcement page is the Toy-Con Motorbike.
How It works
Most of the Motorbike works by moving the Joy-Cons that are inserted in the Motorbike and the gyroscope senses that. The horn, accelerator and brake work by pressing buttons on the Joy-Con.