Harley Quinn and Doc Samson

We've seen Margot Robbie as Harley Quinn looking like her more recent comic incarnation for the upcoming Suicide Squad film, but will she ever don the classic look from the characters original appearances in comics and animation?  While it may not fit in with the gritty look they seem to be going for with the movie,  I'd love to see an attempt made.  There's no reason they can't pull it off successfully when so many cosplayers already have.