Id Software says Christopher Nolan and The Dark Knight influenced the sequel’s name.
CGM Writes: While we were over at PAX East, we were able to sit down with Goichi Suda (Suda51) and talk about the upcoming remaster of Shadows of the Damned
"Treat your players as you would like to be treated, that's it," Vincke says when asked about how to maintain trust with a game's community.
BLG writes, "There are plenty of amazing horror games out there, but some of the very best ones that will leave you shaken to your core are indie horror games. If you’re looking to pick up new games for some scares, here are the best indie horror games you can play."
According to the Doom Slayer article on doom.wikia the current timeline is Doom, Doom 2/Final, Doom 64, Doom (2016) and Doom Eternal.
So why not just call it Doom 2: Eternal
Hell they could have related it to the original sequels name, Hell on Earth by calling it something like Hell Roams Earth or Demons on Earth while using the retro poster but updated like they did for Doom 2016
Cuz there’s already a game called Doom II
It was simply the developers choice.