What are the chances that Fab Melo, Rakeem Christmas, Baye Moussa Keita, DuJuan Coleman and Nerlens Noel will all be on next year's SU team? And if they are, rank them in terms of their ability to play forward.
Chances are slim that all these guys will be there at the same time. That being said, Fab is a true center and it would be unthinkable to play him anywhere else. He will also play this position at the next level. He is an excellent passer, rebounder, blocker, finisher... and now he can hit the jump shot! Has NBA written all over him.
Secondly, Baye is also a Center. He is limited by his ability to gain weight, but more significantly he lacks the offensive skills to play the 4. He is a fair passer with ok hands but has shown no jump shot from any distance, short, long, or anywhere in between. His defense and blocking ability may be his best assets, and an occassional rebound/putback i.e. a center off the bench.
Rak is a hybrid 5/4 that Boeheim is on record as saying he starts for the simple reason that he is the best player at that position. What he doesn't say is that he may be doing more forecasting than real time in describing his skills. He rebounds well, has the ability to block shots, is athletic enough, and I think will develop his jump shot and will only get better defensely. Therefore, he is the top 4.
As to DC and NN, neither has played a college game yet. Both are hybrids like Christmas and could play either position. The real question is where would they best be utilized. DC's highest and best use is at 5, mostly because of his size and strength but he can also step out and hit the jumper. He has really soft hands, great footwork and dominates the paint. He probably plays 5 at the next level too.
NN could be used at either position. Everyone believes his biggest asset is his shot blocking ability and thus draws comparisons with Anthony Davis. I'm not sure how well he shoots it but he will see the floor somewhere 4 or 5. He will probably play 4 at the next level.
I am surprised that CJ and James weren't considered noteworthy hered since both are capable and both are seasoned veterans at this point. However, I think CJ takes over for KrisJo next year and James comes off the bench.
At any rate, these are the kind of "problems" you wish for.