The new Darksiders game has been in development for at least 3 years
While looking at the quote tweets for the Darksiders annoucement, I found this one from a former Gunfire Games employee:
"👀Fun fact: I worked on this.
Excited to see what the team cooked up!"
Looking at the dev's Linkedin page, we can see he worked at Gunfire as an Associate Level Designer between January 2021 and August 2021. Meaning that the game was already in development in August 2021 at the latest.
Obviously this doesn't tell us much about the current state of the game: it might have been put on the back burner until the release of Remnant 2, or the game might have faced some difficulties during development. But with people speculating that the game has only been greenlit recently due to how little the teaser tells us, it's nice to know that the game has been in development for at least 3 years.
Edit: The dev deleted his tweet so he might not want his account to be shared here. I deleted the link to his Twitter account, please don't go bother him if you've seen the tweet before deletion.