This game is really good, I would like them to make a dlc bringing new content, such as a new scenario, new enemies, new weapons and armor, new buildings, new items and equipment. I imagine a dlc as follows, we are in our standard backyard and when we get close to a wooden fence that borders the backyard, there is a small opening to go to the neighboring backyard, where there would be a completely new map, full of new things etc

I agree but this would be extremely hard to implement and would have the dev team work really hard to make the second yard with tons of new bugs that they need to fix