Orlando generally doesn't do exact repeats, but they have featured the same film multiple times, like Halloween and Texas Chainsaw Massacre. If Killer Klowns ever came back, it would need to be redesigned to fit within a new space anyway, since the Shrek house location is gone.
Hard disagree here. It feels like Killer Klowns has become more prevalent in pop culture lately, especially compared to when the house first debuted. It has a new film in early production, it had a video game not too long ago, and I've seen an increasing amount of apparel produced for it at places like Spirit Halloween, and even at Universal Parks a couple months ago. It does have a sizable following for what it is.