My predictions--
1) Either Karmanos, Gilbert or Illitch buy the Pistons
2) Cobo Arena and Joe Louis Arena are torn down to make way for a Cobo Center expansion
3) a) Pistons and Wings move to the new area located somewhere on the Cobo/JLA site or b) to a Midtown arena near Woodward and Temple
4) Wings manage to remain Downtown during the construction of the new arena.
5) The Palace is eventually torn down
6) Chrysler moves Downtown within 30 years.
7) Auburn Hills enters into receivership by the state.

okay okay okay.... maybe not the last two, it is too hard to tell the future, but eventually every stadium is torn down. Also, regarding prediction 3, both have there pluses and minuses. Midtown arena = very large impact on Cass Park area, mostly a positive, although there will likely be displacement of residents by demolition, and gentrification. Cobo Arena = Downtown continues to benefit from Wings fans + Pistons fans, and they all get to use the People Mover, but there is less dramatic change in terms of transforming a neighborhood.