Have realistic expectations, nothing like that was ever talked about or intended so it's not fair to be disappointed by not having it.
Believe it or not, I spent some time working on it and have a proof-of-concept done. First time working on a Doom mod, but I learned a lot, and figured out how the HDoom code works. My new feature works, but it still needs animations. Right now, I'm just using the Doomguy animations as placeholders, instead of both monster girls going at it.
Yeah, yeah, it means the potential for a lot of monster combos. But, if most of the focus was on imps and lesser enemies, most of which are colored-swapped, anyway, it wouldn't be so bad. I'm attempting to put my AI skills into training a Stable Diffusion LoRA or model, but I have no idea how well that'll work. I don't draw normally, especially pixel art, but I'm hoping the pixel art quality will hide imperfections that might show up with SD generation. Upscale the 70ish width pixel art to 512x512, train on that, work in that size, and then reduce it back down.
I'm hoping I can pose some existing characters (a 69 wouldn't be hard to pose, for example), and inpaint the rest of the details. Step 2 is ??? (animate the thing). Step 3 is profit (j/k, I would give it away).