The wedding won't necessarily take place in tonight's episode. It'll just be a flash-forward to show us who the bride is.
I think/hope it's going to be Robin. I think Quinn was just thrown in as a red herring, plus I just don't think she's a believeable character and she and and NPH have no chemistry.
I am hoping for Nora. I liked her in an opposites attract kind of way for Barney. I also liked that he seemed to want to be a better person for her. I hate Quinn and I just don't think Barney and Robin are good together.
I don't think it's Quinn. I think Becki Newton is slated to be in a new show in the fall. I also hope it's not Robin. I *hate* that they want to couple them up.