The Universal of a few years ago would probably laugh at the idea with them focusing on newer/relevant IPs, but I think they've realized that forcing IP for synergy reasons isn't the best way either and never truly a huge hit (Fallon*, F&F, etc.). I'd make it an omnimover-based attraction that starts off with westerns, moving on to monsters and then hit the heavy hitters (BTTF, Jaws, Kong, etc.) and maybe a modern classic or two (heck, you can now have Wicked as a scene). Doesn't have to be a 15+ minute experience, just a nice dark ride with no motion or screens.
*I like the Fallon ride, but it's pretty funny to think some executive thought it would churn merchandise or increase visits.