One of the biggest changes I'm deciding on is if battle birth should still be a factor, and if pregnant characters should even be involved in combat to begin with. The current plan is to have the "fertilization" take place between battles instead of during them. Pregnancy would also take longer and there would be more options and chances to interact with said pregnancies instead of them being a quick blip at the start of a turn. I'm considering characters that can utilize a psuedo-pregnancy to create spirit allies in a manner somewhat similar to before though.
Another big change is ally recruitment. The player will have access to a wider cast as the game progresses. There are also two classes of recruits: Brawlers and Breeders. More on that though when the game is closer to initial release...
Regarding the current characters in Gravid Gauntlet... I wasn't planning on having them cross over into this new project. Except maybe Mudboat... The new characters should be more polished and balanced, particularly since this game doesn't have a deadline like GG did.
As a side note, I was planning on making a Discord alongside this project when it is initially released. It would be a great source for community feedback and help keep me motivated on my projects. I just didn't want to start one until I had something to merit making it.