 ", Mysterio cost Angle a match against Billy Kidman by attacking Angle.Another feud heading into SummerSlam was between Shawn Michaels and Triple H. At Vengeance, Michaels returned after being out of wrestling (due to a back injury) for four years.Triple H was given the choice of deciding which brand he would appear for, Raw or SmackDown!, and Michaels helped him decide by offering to reform D-Generation X (DX) on the Raw brand.