I never add anything to it before freezing (especially pork) because fat don’t freeze and gives it an off flavor, after 3-4 months, even if vacuum sealed.
I do add some egg, to help keep venison burgers bound up, on the grill. One time, my wife stuffed a few raw ones with crumbled bacon and blue cheese, left them on the fridge a day to bind up, then cooked them medium rare in the air fryer. They were phenomenal:
I’ll have to try and get her to do that again someday. Plain old straight ground venison works best for most of what she makes. We just finished a meal of our kids favorite: tacos. My personal favorite is her stuffed cabbage. Spaghetti with meat sauce is very good too, as is stuffed peppers and chile.