To be fair, the North Eastern Village already has its own pregnancy scene, though I don't know exactly how to trigger it myself, she can wind up birthing Abomination Broodlings in the same little shack she winds up in when losing to the villagers with parasites as well as the priest in the first encounter. Frankly, I don't think we'll get much more to the pregnancy mechanics in this game as it largely serves its purpose, and most areas do have a birthing defeat of some sort involved, in fact, this game has almost a majority of breeding/birthing content as its final defeat states, with the Demi Human Lair, Leeches, Innard Cave, Cathedral, Pigs, and even the parasites in the North East village all able to lead to a ultimate game over state involving pregnancy and birth.
Only oddity I find at all in the system really is just how it is so general in application, getting knocked up by a demi-human can lead to a pig baby and vice versa. A bit of a limitation of how its handled, though, I will admit that in general? I think its pretty fitting that any pregnancy source can wind up an abomination broodling or "strange baby" given what we see with the village girl we give an abortion to.
Its hard to say for certain what we should expect from DLC, though there is a couple places that seem perfectly fit to add new levels, or extensions to the map at least, so I won't be too surprised if we get something there, maybe something more bug/spider focused, maybe something more akin to the lab from the first games set of DLC. Lots of possibilities, but nothing worth wracking our minds over too much right now when there's very little to actually go on.