I remember Duncan.
Does anyone have a wish for who they'd like to see?
I don't know which thread I saw this on(Or possibly the spoilers board), but the idea of someone Ali knew who the Liars don't know or that they know but dismissed or it's someone we'd never normally get to see being on the team appeals to me.
Maybe Sassy! Extra?
I'd like to see someone from Radley that Mona knew or another student who came from there. Even someone in 9th grade that the girls knew, but only viewed through Alison's eyes.
I don't know...maybe one of Spencer's Field Hockey teammates? Someone on the swim team? Hannah probably made a lot more friends when she became queen bee.
More flashbacks in general that show this stuff would be nice. Even with those webisodes they could do this.