I'll disclaim this first and foremost: I don't play PPR, but I do play in a 2 QB league.
Cam Newton- I think the 2nd half of last year is what we will see all year long.. he stays healthy, he's going to be good.
Carson Palmer- I actually have him as my 3rd QB in my league, I think he will be consistent with last year, lower average though.
Sam Bradford- This is (for the first time) his 2nd year with the same people in place. I think we will see Sam Bradford have his best year yet because of this.
Jamal Charles- I can't say much about his PPR, being with the chiefs IMO is a downfall, but he is a beast, he will do well reguardless.
Not going to comment anymore on the other guys because of PPR, but you have solid WR's IMO, and I think Cook will be a good TE , at least above average.
Prater- (bronco fan) will kick lots of PAT's without a doubt on Denvers high scoring offense, also has the leg and accuracy to pretty much make any field goal Denver asks of him.
Rams- Solid Defense all around-'nuff said.