As far as The Ring goes I don't really think it will happen, but I kinda judge the relevance more on the way the imagery it and The Grudge (to a lesser degree) introduced is still relevant to pop culture rather than how relevant the 2003 movie is itself. I think the fact that there's knock off scary long haired ghost girls in halloween stores every year means that the films were impactful enough to permeate American culture in the same way that Universal's versions of Classic monsters have become the default versions of those creatures over and over for years without people having seen those films. It's become a halloween time trope in and of itself like a scarecrow or a grey alien. I think The Ring would be a great supporting act in a well rounded line up and would honestly be really eerie. As far as the material theres def enough there to make something work. They've done more with less. Majority of you raved about how good the Unfriended section of Blumhouse was, the Exorcist was a hit as stated before, and literally anything would be better than This Is the End.
On Ghostbuster I actually really like when non-horror/ left field choices are made I made a whole thread about ones I'd like to see a while back. I enjoyed the first Ghostbusters made. I do prefer them sparingly though I feel like they should be a treat. I think last year (for me) had too many left field choices. Even the marketing material with The Weeknd, A Quiet Place, and the most recent Ghostbusters looked really goofy to me. The rumors this year are starting to sound similar.