King Dedede BETTER not get the Colonel Sanders voice...my main will NOT be selling Kentucky Fried Chicken, thank you very much >.>
I don't think he will, since Nintendo recently broke away from 4Kids doing Pokemon, and Meta Knight has already been revealed to have a new (deep badass) voice, so I wouldn't doubt that the King of Dededes will have a brand new voice as well. Since, in one of his victory poses, he does speak, so we can most likely expect him to have an American voice.
I'm personally hoping for a modification of his Japanese voice, like a gruff English representation of Genghis Khan :D