I don't think it will be anything like the crowds we saw for the last showing of Illuminations or what we're likely to see on the last night of HEA. EF doesn't have a history, there's no long lasting memories people have formed about it. While the new version of it is impressive, what was showing before was a lackluster, error filled temp show. There will probably be more than usual, but I don't think it will be enough to make a huge difference in the park.