Board Thread:Arrow discussions/@comment-25029540-20151202190752/@comment-152.7.41.33-20160123013807

One definite possibility is Samantha Clayton, If she was killed, Oliver would probably adopt her/his son because of that turn. If it happened it would also have revealed to Felicity that Oliver had known about Connor, which was what happened in the crossover, where Felicity fought with Oliver in the aborted timeline. This could have been the reason why Felicity no longer wears the ring.

I could also kind of see it being Donna Smoak, although taking her away would remove her as Lance's girlfriend, which I think is unlikely, though it would make Felicity emotional.

Otherwise it could be someone to be introduced in future episodes.