What is Block B's Zico teasing for?

On November 17, Zico updated his Instagram with a mysterious picture that are making people wonder if he's making a comeback! �The picture is black with three matchsticks surrounding the date 2016.11.28.�

Netizens responded with, "Maybe a comeback?" "I always get it wrong so I can't make any guess," "Huh? �What's this?" "Is this for solo, not group?" and more.

SEE ALSO: Zico leans back in solo 'SPOT!' concept photos