College Football Playoff Rankings
The new one isn't out yet. I'll link to it when it's available, but the playoff picture already seems to be pretty clear.
If they run the table, it will be Oklahoma, Wisconsin, Alabama, and the winner of the Clemson-Miami game. The fact that Clemson and Miami have to face each other removes the problem of having to fit five teams into four slots.
Of course any of those teams could still fall. The eventual SEC champ (Alabama, Auburn or Georgia) and the Clemson/Miami winner seem to be locks, but the Big Ten could lose its slot if Wisconsin falls in the championship game, and the Big 12 could end up empty-handed if Oklahoma can't win the conference. If Alabama beats Auburn, then loses the conference championship in a close game to Georgia, the committee could easily decide to place the two SEC finalists in the playoffs, especially if Wisconsin and/or Oklahoma can't run the table.
Sagarin's ratings show pretty much the same thing. His system really likes Penn State, but the Nittany Lions are blocked. If Wisconsin wins the conference with an undefeated record, they will certainly be in. If Ohio State wins the conference, they may or may not be in, but they will have a better claim than Penn State, having won the head-to-head match and adding the conference championship.
Notre Dame does not seem to have a path to the finals, having lost to both Miami and Georgia, two teams likely to end up with equal or better records.