Gail said they seriously wanted Misfit to be Batgirl. She also said she worked on a treatment (didn't say who but I assume it wasn't Misfit as she was opposed to it). So this sketchy to me.
It was also Dan's idea not to put her costume in the Batcave wasn't it.
There is a page in the new issue that discusses how you're costume gets displayed. Let me see if I can post it.