It's about time. I believe the Ibuki and Alex costume were revealed over a year ago. Anyways, Capcom has announced that SFV is getting a new DLC pack and it will include three classic costumes and a new stage.
First off, Ryu's classic "Temple Rooftop" stage from Street Fighter 2 is returning. Also Alex and Ibuki will be getting costumes based of off Street Fighter III Third Strike and Juri will be getting her default Super Street Fighter IV costume as well.
The Classic pack will be available on July 25th for PC and Steam for $4.99.