I'm new and just finished up running Amidst the Ancient Trees, which was a lot of fun. My group of players are new to CoC, but not new to ttrpgs. Anyway, I'm writing up a campaign to play next that's set in the 1980s. I'm really enjoying building up the setting, aesthetic, locations, atmosphere, etc. Largely inspired by Beyond the Black Rainbow, The Thing, Vaporwave, Stranger Things, Stephen King (in general), a little TRON, Poltergeist, Paper Girls, etc. I'm thinking of having something involving a government/university facility running tests, as well as an arcade in town. I imagine Stranger Things has inspired a lot of people to write up some plots to play.
The issue I'm running into is I can't decide what eldritch horror is going to be present in some way. A tip that I saw around online is that it doesn't have to be an Elder God per se. Hell, my group was thoroughly creeped out by Servants of Gla'aki, and not so much Gla'aki itself.
I guess to explain a little more, I have this scene in my head that sounds cool and involves light-bending or physical-space-warping. Not to the players (at least, not yet), but they witness it happening from a distance. But there's a LOT of entities that can move freely through space-time, and so I can make several work.
Ideas? Suggestions? Also I'm new to the system, so any tips would be great.