I played it on the Wii U last year, and loved it. Really great game that PS and Xbox fans should try out. I never did a New Game+ though...prolly should start that sometime.
As for the bonus content, it looks cool, and hopefully it convinces people on the fence to try it out. I agree with others that having it a year early makes up for the lack of extra stuff...but I certainly wouldn't complain if Bowser or Dark Link appeared in a future update.
*secretly waits
NNID: Zephyr25 / PSN: Zephyr--25 / Switch: SW-4450-3680-7334