It might be cool if she came back, but seeing as her only connection to DM was Jim, I don't think it'll happen.
Unless....wasn't it said somewhere that in and upcoming episode Ryan looks/gets a hot assistant?
Maybe it'll be her. Although it would be kind of ironic that Katy moved to New York and just happened to get a job at the same company her ex boyfriend from 2 years ago works at.

That would be ironic. I alway saw her with Roy, because of that one time on the Booze Cruise when they were talking, and she was a cheerleader, and he was a football player. But she might just be Ryan's assistant.

I think she could come back, again, and try to sell purses at the Scranton branch, thinking that Jim is safely tucked in Stamford.

Did she know that he went to stamford?? I thought they were over before that.

You never know. They could have had contact.