You cannot reintroduce a species that never existed here! Wild pigs are not native here. They are a feral species that causes problems throughout the United States. They number largest in the Southeast California, and Hawaii. They pose risk to native, and rare plant populations due to their foraging and digging. They have no niche in the ecosystem here, and introducing any non-native species is dangerous. When feral species are purposely introduced, the risks must be weighed. It happens often. The brown trout that I enjoy fishing for are imports. They happen to fit in an unfilled niche, but they do pressure native fish species such as creek chubs. Pigs do not have a niche. They would compete with deer and turkey severly. I have hunted pigs in florida, and I enjoy it. It's not challenging. There are lots of non-native wild species in our country. Some populous and problematic ones are: Feral cats, feral dogs, wild horses, european starling, nutria, burro, goat, red fox, rock dove, (and many more). Not to mention dozens of species of fish that destroy native populations. Look at what zebra mussels and gobies have done to lake Erie. And what carp have done to the Mississippi.
Anyway. My point is that introducing pigs purely for hunting would be bad. Nowhere in the US are pigs introduced by any DNR.