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What's 'Limitless' about Mark? Everything, from his unique hair styles he's sported in all of the NCT units, to his possibilities as a member of NCT U, NCT 127, NCT Dream, and more! 

For NCT 127's 2nd mini album, the original 7 members will be joined by Doyoung and Johnny to form a 9-member unit. Judging by the performance snippets we've been given so far, NCT 127's comeback choreography looks dope! 

'Limitless' is set for January 9!