MBLAQ took part in a recording of KBS 2TV's 'Yoo Hee Yeol's Sketchbook' and revealed who they wanted to work with for a sub-unit.  However, this was not limited to just MBLAQ members very much like how Toheart combined INFINITE's Woohyun and SHINee's Key.

For this fantasy sub-unit, G.O chose 2AM's Seulong, Seung Ho chose his schoolmate and senior B2ST's Junhyung, Mir chose g.o.d as he was a fan of the group since his youth, Thunder chose Big Bang's G-Dragon, and Lee Joon chose ZE:A's Kwanghee.  

Lee Joon said, "Because there are a lot of members in ZE:A, Kwanghee complains that he gets too little parts.  I understand his feelings, too.  If we were to promote together, we could sing as much as we want."

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Thunder also talked about promoting as a unit with his sister, 2NE1's Dara.  He said, "My mother sincerely wants this, but it's hard in reality because our companies are different. However, I think it's possible to have Dara feature."

Which suggested sub-units above would you like to see?