Nightmare Fuel / Halo Infinite

• On June 24th, 2020, a teaser for Halo: Infinite was dropped. All it shows is a datapad intercepting an alien transmission. One would assume it's about remnants of a faction of Covenant, but it's not. It's worse.
  "The hour approaches. Our forces occupy the ring, within hours, it will be under our control. Humanity will burn. Their brazen defiance will be all but a memory. No more Prophets, no more lies! We stand together, brothers to the end. We are his will. We are his legacy. We are the Banished."
• As of Infinite, the Hunters no longer simply grunt when they attack. Now they make some unearthly roars, sounding less like a sentient being and more like an animalistic monster. Here, have a listen, and imagine a 13 foot tall behemoth chasing you down.
• The Boss Battle against Jega 'Rdomnai. It starts with the player hearing the voices of the Pilot's wife and child coming from a room in the third training course, and when the Master Chief picks it up, Jega starts speaking in time with them as they're bidding the Pilot goodbye, briefly scraping his crimson-red energy blades across the floor and ceiling to add to the deathly-vibe in the room, all the while telling him he won't be leaving alive. He then decloaks, ignites some very scary-looking energy blades, and seals you in the room with him, remaining cloaked while creepily taunting you throughout the fight. Mercifully he's actually one of the easier bosses in the game.
  Blade Master: Say goodbye...
• In a later-game mission, you begin to hear whispers from Cortana. Some are callbacks to things she previously said in the series, which can be tearjerking or nostalgia-inducing. Others? Others are cryptic statements spoken in rhyming verse of trochaic heptameter—the same speech pattern as The Gravemind. This implies that Cortana's Face–Heel Turn may have been due to the Gravemind's Mind Rape of her in Halo 3.