I think Omid will die, due to his leg getting worse. He might not be able to keep up with the group or he will be left behind sometime in Episode 4. I think Ben will also die, or at least leave the group. His guilt is probably eating him from the inside and he will:
A) Run away from the group.
B) Tell the others that he was the one supplying the bandits with food and be thrown out.
C) He might commit suicide.
D) He might get snatched by the Walkers and there will be no-one there to save him.