According to Dave Meltzer on the most recent episode of Wrestling Observer Radio, Mickie James was written out of TNA storylines because she has a series of booked dates that conflict with the next set of TNA tapings this month.
TNA ran an angle with James Storm and Mickie that saw Storm shove her on some train tracks after revealing his motive for their relationship, and Mickie’s rejection. Mickie is advertised for Miami SuperCon on June 25-28, and the TNA TV tapings are June 24-28 in Orlando. Mickie herself has noted in the past she was back for a short run only, and it’s still possible she could appear since the locations are about four hours apart, but Meltzer noted she may not return for awhile, or at all.
Source: Wrestling Observer Radio