I believe "The Conjuring 4: COVID-19" will be more horrifying if it happens in 2020 - 2021, especially in the current status of brutality and horror of man made viruses. I think the effect of such horror movies, like conjuring 3, are going to be diminished during the pass of time because their context and temporal period are not tangible any more. Just imagine a "Conjuring" with all its events happened a year ago, of course with all documentations and facts.