Although there were numerous sneak peeks that teased upcoming character appearances, we didn’t get our first real preview of the new season until the D23 Expo that took place in Anaheim, California over the weekend.

The preview picks up where the Season 4 finale left off, and shows the extended Charmings in a state of turmoil over Emma’s sudden disappearance. If you haven’t done so already, you can take a minute to watch it now.

It looks as though the new Dark One is already causing a rift between the heroes. Regina, despite being grateful to Emma for saving her life, now thinks of her as a ‘problem’ that must be dealt with. A tearful Mary Margaret is convinced that her daughter still has the capacity for good. Meanwhile, Killian is obviously anguished about the situation. It’s clear even from this short clip that he’s determined to find his Swan, whatever the cost.

Which leads us to the glaring question: where exactly is Emma?

After being ‘sucked up by a vortex of evil’, as Regina put it, she could have landed almost anywhere. However, we’re provided with a very important clue as to her whereabouts: ‘she’s not in this world’. Has she possibly been swept away to Camelot? Emma’s appearance at the Round Table would definitely shake things up a bit for King Arthur and co.

One thing’s for sure: there’s going to be a whole lot of inter-realm travel to look forward to. After an entire season set in Storybrooke, a change of scenery might be just what we need.

Once Upon a Time is slated to return to our television screens on September 27, 2015.