One of Elden Ring's boss fights may have originally been created for Dark Souls 3

gamesradar.com:

One of Elden Ring's boss fights may have originally been created for Dark Souls 3.

Elden Ring's bosses have all got their own unique style and devastating movesets, but, according to the latest discovery of Dark Souls sleuth ZullieTheWitch, one of these epic battles might have been cooked up by From Software long before they created the Lands Between.

Make it to the end of the Academy of Raya Lucaria, and you'll be faced with a boss fight against Rennala, Queen of the Full Moon. As Zullie's video (thanks, PC Gamer (opens in new tab)) points out, Rennala possesses the power of rebirth, something she has in common with Rosaria, an NPC from Dark Souls 3. In the first phase of the battle against Rennala, her daughters spawn from cribs suspended from the ceiling. If you look around Rosaria's room, you'll see similar cribs, which could have served the same function for Rosaria's man-grubs.

And there's some pretty substantial evidence of an unused boss fight against Rosaria. Zullie goes on to explain that modder Katalash found an event trigger whose label translates to 'Boss Battle BGM Rosaria'. "This event suggests her room was her arena, and corresponds to an unused audio track, which would have been her music," says Zullie.

It's highly likely that a battle against Rosaria never evolved past the conceptual stage, but it's nonetheless fascinating to see how unused concepts from From Software's older titles could be resurrected years later and introduced into Elden Ring. 

If you've conquered the Lands Between and need a new challenge, take a look at these games like Elden Ring.