New Super Smash Bros. for Wii U Stage Leaked on Facebook

A post on the Official Super Smash Bros. Facebook page has accidentally revealed what appears to be a new stage in the Wii U version of the game.

In a recap of posts from the previous week, one new screenshot seemingly confirms a mine cart stage. The caption notes how this level has "some rules that are rare in the Smash Bros. series" and how "Kirby's going for a ride in a mine cart."

At time of writing the post is still very much on Facebook, and given the official nature of the page, it's likely that the new level will have a mine cart element to it.

Fans have speculated that the stage could be inspired either by Donkey Kong Country, the obvious choice, or a setting from a previous game in the Kirby series.

What do you think the new level could be from?