Did you know Namco Bandai makes Mario Kart games too? Nintendo have allowed their local rivals to develop the last two arcade iterations of the series, and there's a third on its way this year. The unfeasibly-named Mario Kart Arcade GP DX has a mixture of modes and features that might well never make it into the next console edition.
With Mario Kart 7's underwater driving and gliding, a Double Dash-style co-op mode, online functionality (including Alter-Ego mode, which creates ghosts of other past racers) and Tank! Tank! Tank!-style personal pictures, there's certainly a lot packed into each machine. There's even an appearance for Namco's own Don-chan, the main character from the rhythm action Taiko no Tatsujin series, and a themed level to go with him.
While no European release has been announced, the last two arcade efforts have reached us in the past, so we wouldn't be surprised to get a chance to try DX out in the near future.