- It is definitely Katy Perry Week, though we don't know if she'll show up
- Past ABDC champions Poreotics, We Are Heroes, and IaMmE will be performing. We haven't heard about any of the other champions appearing
- The past champions will dance in group numbers with current contestants
- It doesn't look like they'll have a reunion of all the crews from Season 7.
MTV posted a few behind-the-scenes photos of the rehearsal, including the one here of Mami (We Are Heroes) practicing with Charlize (8 Flavahz). Click here to see the rest of the photos.