Sentence:  According to rumors in the entertainment world on December 6, Girls' Generation will be making a <WSD>comeback</WSD> next year with a masculine concept. They have supposedly decided on the title song in their new album and have begun filming the music video on December 6. It appears they have started preparing for a full-scale <WSD>comeback</WSD>! It will be the girls' first Korean <WSD>comeback</WSD> in a year since "I Got a Boy." 
Meaning of the word marked with <WSD> tags:  A return (e.g. to popularity, success, etc.) after an extended period of obscurity.