I will make this prediction based on talent and depth.
Possible Weak Positions
WR: This is an obvious one, with the Ravens not having a clear No. 2 or maybe not even a No. 3 receiver. The only sure thing is Torrey Smith. I might be completely off. Tommy Streeter, Deonte Thompson or Tandon Doss could all break out.
LT: While Bryant McKinnie is good, he occasionally loses motivation. There is no guarantee he won't this year. There also is poor depth. Oher is mediocre and Osemele is unknown at LT. If McKinnie loses motivation or gets injured we could be in a pickle.
C: This also is an unknown. There is just no proof that Gino Gradkowski will be an adequate center. I think he will, but there is just no proof that he will be any good.
CB: This is very unlikely. Lardarius Webb could have some major setback. Jimmy Smith could continue to not break out. That would leave Corey Graham as our only proven cornerback. This is very unlikely though.
These are the only weak positions I can think of. QB is set. The Ravens are amazing at RB. FB is good. Pitta and Dickson at TE. We have Kelechi Osemele and Marshal Yanda beasting at guard. Oher is good at RT. Our D-Line is loaded. We have great talent and depth at every LB spot. Huff and Elam will be good at safety.