Doing a deep dive and looking at the 5 houses that have been in Shrek, we had an original first (Wonderland 3D), then 4 straight IPs. The interesting thing, is that the IPs have spanned various decades: Krampus was the 2010s, Saw was the 2000s, Halloween 4 and Killer Klowns were the late-1980s. All of them are known, but non-headline IPs.
So, missing anything from the 1990s or before the 80s. Looking at some 1990s known but non-headline IPs that could be a fit (and not owned by Disney and haven't already been here), I came up with the following:
- Candyman (1992) [yeah, I know, I know LOL!!!]
- Silence of the Lambs (1991)
- Urban Legend (1998)
There's not a lot to choose from in that decade that they haven't already done (People Under the Stairs, Dusk Till Dawn). Candyman and Urban Legend would essentially be the same "type" of house (and both built on urban legends) - just swapping a hook for an axe - and maybe too similar to TCM in style. Which keeps bringing me back to Silence of the Lambs which fits the known 90s IP but not headliner that is different from other houses and would fit into a smaller venue like Shrek.