Jackie Chan To (re)Play Mr. Miyagi
Wow is this remake gonna suuuuuuuuuuck.
Jackie Chan < Noriyuki "Pat" Morita
Jaden Smith (Will's kid, who is 10, by the way) < Ralph Macchio
And there is no possible way to replace Billy Zabka. If the producers are smart, they'll cast Zabka as the "bad" sensei, even though the moving is supposedly based in Beijing.