Apparently licensed games still have some life in them.
http://www.nintendoworldreport.com/news/40712/ubisoft-returns-to-3ds-with-gravity-falls-legend-of-the-gnome-gemullets
Ubisoft has teamed up with Disney Interactive to bring Gravity Falls to the 3DS this fall.
Announced at San Diego ComicCon, the game is a 2D platformer where you control the show's main characters Dipper and Mabel as they try to save a kingdom of gnomes. The key art for the game was designed by the show's creator Alex Hirsch.
The game is being made on the UbiArt engine previously used for Child of Light on Wii U and Valiant Hearts for PlayStation and Xbox platforms. This is the second Ubisoft game to be published on the 3DS since 2012, with the previous game being last year's Tetris Ultimate.
A short trailer has been published for the game, which you can see below: