All work on her solo comeback has been halted, and release has been indefinitely postponed. MBK Entertainment and her label had been conferring about songs and concepts - however, as of the 13th, Star News has found out that all work on her solo album has been canceled. This means she won't be coming back in March or April as planned.
One of the reasons why work on her solo release has been canceled is because of the recent re-focus on the T-ara-Hwayoung-Hyoyoung controversy. Her label didn't want people to mistake that she was using the controversy to promote her album. Therefore, all work has been halted until everything calms down again and her album can be promoted just through the music and herself.
Hopefully, we can see her soon nonetheless.