In the fall finale of arrow it is lead on that felicity will die by the time the show returns I dont believe that to be true because...
Barry wouldnt be late to her funeral!
In the funeral clip they show us. Barry shows up after the funeral ends and leaves fairly quick, BUT barry and felicity are very good friends and barry would be devastated if she died. Which leads me too believe that
1. Someone else dies and is in the grave.
2. Felicity lives and team arrow is trying to trick dahrk into believing she is dead.