I posted this over on Facebook... I know the story details they released don't support this happening, but it would be an interesting direction for them to go I think:
Just totally blue skying here, but this gives them the perfect opportunity to usher in a new era of Icons. The Icons have all been absent for years, aside from last years Scarezone. They have the oppurtunity to build a story behind why the Icons have been gone. Chance eludes to having been captured. Perhaps the same thing has happened to the other Icons as well, and they are all now inmates at an asylum (sans Jack)... That is until Chance's arrival. She takes control of the asylum after having been captured and releases the Icons in a bid to escape, opening the way for the others to be used in the years to come.