Rumor StatusBlue Sky
A new fireworks show called Happily Ever After debuts at the Magic Kingdom on May 12th. The new show integrates castle projections with fireworks leading to speculation that the Once Upon a Time projection show may end when the new fireworks show debuts.
Disney has publicly denied this to be the case, but there is reason to believe that may change.
May 2, 2017: WDWMagic.com user Disney2017 is reporting that June 3rd may be the last day for Once Upon a Time. It was later confirmed by WDWMagic.com user MagicFeather that the show is expected to go away.
February 9, 2017: The Disney Parks Blog announced the new fireworks show "Happily Ever After" will debut on May 12th at the Magic Kingdom, replacing Wishes.
In the comments of the original post, Jennifer Fickley-Baker acknowledged that the new show would not replace Once Upon a Time.