Bronco is playing more freshman than ever now so I would expect several of them to fill in the 2/3 deep. Matt Hadley, Micah Hanneman, and Butch Pau'u return from mission's soon, I bet at least those three RM's get PT next year. Tyler Cook and Phillip Amone will likely be in the LB mix as well.
My biggest concern with that group is DB, it would be nice to get another JC DB or two that could play FS and or Nickel.