Here's my thought:
Dusty comes out and calls Stardust and Goldust down to the ring. He talks to both of them but really comes down hard on Stardust, forcing him to acknowledge that he's Cody, and that they should be challenging somebody (maybe the Usos? I can't remember if there's a title match at FL for the tag titles) at Fast Lane. So, we get set up Cody and Goldust vs. the Usos (or whoever). At FL, Cody comes out sans paint and one of three things happens:
1) The Dust Brothers lose and one of them blames the other and attacks them, giving us Cody (or Stadust) vs. Goldy at Mania.
2) Goldy turns on Cody at Fast Lane (blaming the fact that Daddy loved Cody more) and they lose because of it, setting up Cody vs. Goldy at Mania, with Goldy as the heel.
3) Cody turns on Goldy at Fast Lane (blaming the fact that he was a better son than Goldy?) and the lose, but Cody comes out as Stardust again the next night and sets up Goldy vs. Stardust at Mania, with Stardust as the heel.
But, we'll see.
wk