Being a huge fan of this show as I am, I am one of those that was extremely upset when many of the main characters either quit or were asked to leave following its sixth season. I was even more upset when it was published that the seventh season would be its last season ever.
With Once Upon a Time coming to an end after seven seasons, many, including me, are left to wonder what could have been. What if this character made an appearance? What twists in their story could have been added? How would they interact with the other main cast? Here's a list of characters and possible storylines for each one. I believe that a few of these could have also enabled the show to continue or a season or two.