Tennessee has the potential to (finally) make the Final Four again. But it's a question mark, based on how their new players perform. It's not just about whether Diamond can do her franchise player thing (I'm sure she can), but how well Te'a Cooper hits the ground running, IMO. Also how good Russell is this year.
South Carolina, despite adding nobody, can't be counted out, IMO. They nearly beat ND this year; next year I think that Wilson and Coates will be starters - something that perhaps should have happened this year. I think they stand a decent chance of being better than this year, especially if Wilson has a good frosh-to-sophomore jump.
ND can't be counted out either. But depending on how some other teams improve next year, they could easily fall back to 4th, which would likely set them on a path to meet UConn in the FF if both teams perform as expected.
There's also a chance that they'll fall back to the 2 seed level if SC, Baylor, Tenn, and/or others all overperform this year. But I don't think anybody wants to see them as the 2 seed in their region.