Board Thread:Spoilers!/@comment-24386552-20140609002306/@comment-4877635-20140609163435

Or the episodes events could be about something other than Elsa coming. She could just be mentioned like Cora in Season Two. She wasn't in 2x01, 2x05, 2x06, 2x07, 2x11 or 2x13 and yet she was the main enemy in the first 16 episodes. Missing from 6/16 episodes and she was still a major character. Could be the same for Elsa.