First off, he's not promised a time frame for any of these updates. He's said over and over in his Discord the updates will be out when they're done. So no promises were made.
I've got some information that can help clarify a few things.
You got Mango, whose got multi-staged animations. (The grab to swallow the player up, the foreplay animation, the sex, and finally the aftermath)
Then you have Mordicai, who's a ghost who died dressed up in the bunny outfit. His stage will involve the sewers alongside the rats. It'll be filled with some sort of hypnotic gas which will knock the player out if they linger too long. During that particular stage, Mordicai will try and tempt you to fuck him which, if you give in, will probably result in an instant game over... unless Doggie allows you to try to struggle free. I'm sure it's also going to be a multi-stage animation... but if not, then at least two animations per player character if the WIPs section of his Discord is anything to go by.
The sewer rats... will drag you away for some fun if you pass out from the gas or their grapples. I've heard some rumours about potential transformation for the player character.
As for the civilians you rescue, I doubt they will have scenes. (Maybe in a future update if Doggie feels like it? But doubtful)
He's also added a new Rat item, where you can have a rat pet. Just don't give him a bath. (You'll see)