JYP Entertainment unveils a mysterious image, possibly for 2PM's comeback?

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JYP Nation tweeted the teaser image which has the Korean letters, '?????', which could be an acronym for the title of an upcoming song or album. It's no secret that 2PM has been into the use of acronyms during their latest comeback with "ADTOY" as one example, and the boys might be returning with another one for their new song. 

Of course, the teaser image could also be for another artist or maybe even something completely unrelated to music, so we'll just have to wait until more clues are dropped!

What do you think it could mean? Leave your guesses below!