The main cast were divided into two groups, which many interpreted to mean that one group is more privileged than the other. The bottom group is comprised of 2AM‘s Jinwoon and actress Kang Sora, who were hinted to be characters from a rough background (see here and here for still-cuts from their introductory scenes) earlier.
Meanwhile, the other group is comprised of SISTAR‘s Hyorin, T-ara‘s Jiyeon, and two male rookies named JB (JYP Entertainment) and Park Seo Joon (KeyEast Entertainment).
The haughty looks they toss at Jinwoon and Kang Sora (who volley with scowls of their own) seem to lend credence to the theory that their characters are talented, but arrogant.
‘Dream High 2′ will undoubtedly be releasing more teasers, so stay tuned to K-PopHolic for updates!