Well most corrupted creatures are connected to the demonlord but not all.
And yes, there will be more that ties to the other games, next update will expand the game area a bit with a few more areas and new people as well as the two updates following that, and just then we will get updates with bigger lore and more with the maincast, because by then the mainframe of the game is build.
I have noticed that some plants in the game have certain properties, do all plants of these species have the same properties, like the catnip and melon, or only those ones in the game. Also, some animal products also have properties, like the pixy dust and wool, does this imply that pixies can change their gender/ don't have a gender? And that people like sheep farmers risk transformation through contact with their livestock? Also some fruits like peaches also tf, and they gender swap as seen in the breezes scene, my favorite scene in the game btw, since it wasn't combined with the pixy dust, only a standalone juiced peach. Or might these ingredients be magically altered as seen by Vee specifically studying the art of spicy magic.
And sorry for the long paragraph, will the demonlord be present in the distant future? AND MORE BREEZES AND GAMBLING SIM PLS!!!!