Nicky Is Married
One of the most shocking moments in the flash-forward is that Jack's brother, Nicky, is actually at Rebecca's bedside. In the season four finale, we also learn that he's married. While some fans have theorized that he's pretending to be Jack because of Rebecca's memory loss, it's also possible that he ends up with Cassidy. The two reconnected in the season four finale, making us wonder if they get even closer in the upcoming season.