Girls' Generation announced that there was a special preview in the works for 'Marchen Fantasy'!

Tiffany, Seohyun, and Sunny sat down for a video message for their segment of 'SMTOWN WEEK', where they promised fans stages that they'd never seen before, and also stages they may never see again. The theme for 'Marchen Fantasy' is, like its title, a fantasy fairytale.

The girls also announced a "big, big, big, big, biiiiig special preview" for the fans at the concert! With the girls' comeback revealed to be in early 2014, many fans are guessing it may have something to do with the comeback. 

What do you think it may be?