I honestly believe the next Penguins coach will be Red wings assistant coach Bill Peters.
— Josh Rimer (@JoshRimerHockey) June 19, 2014
Rimer called the Rutherford hiring a few days before it happened, so there seems to be some truth here
As far as Peters goes, he has had success in Juniors, the AHL, but he has only ever been an assistant in the NHL. He is currently with the Red Wings.
EDIT: Never mind.