9) Return To Earth-2
We spent a little bit of time on Earth-2 in The Flash‘s second season, but nowhere near enough. With Harrison Wells and his daughter Jesse heading back there in the finale, you may think their story is over, but chances are that their world and memories will have remained unaffected by Barry’s decision to tamper with the timeline, and that makes them the perfect candidates to help him restore things to the way they should be.
As “Harry,” Tom Cavanagh became as big a highlight in season two as he was when he was playing the sinister Reverse-Flash in the show’s first year, and it would be a great shame to say goodbye to both him and the talented Violett Beane, especially when it feels like the latter’s arc in particular has only just begun to start playing out.