The best teams next year are MSU, Zona, KU, Duke, and UK.
Each of those teams have major flaws:
MSU is still pretty young with their starting five featuring four Sophs and a Freshman. Their 5 man is 6'8 at best and is not a superior athlete. Their PG is good, but not great. They have depth and a star or maybe two (Bridges, Jackson), but aren't head and shoulders better than everyone else. They have a good coach and will be a tough, hard-nosed team that could win it all.
Zona has two major flaws. First, they do not have an elite PG. Second, their coach has yet to make it to the Final Four, so a title is going to be tough to come by. The talent is there at every spot except PG. Duval would have made them a killer team. Jackson-Cartwright does not look like a championship level PG. Ayton is a superstar, though, and Trier and Alkins are exceptional college wings. Those three could pack them to a title.
KU has veterans, they have talent, they have a little bit of everything, but they lack depth inside. Azubuike is a very good big, if he stays healthy, but they have pretty much nothing after him. Preston is a stud. Graham and Newman will give them a good backcourt. Mykhailiuk, Vick, and Cunliffe are solid wings. Just not enough beef inside. If Azubuike is in foul trouble or gets injured, they will be pedestrian inside. Self is a good coach, though, and if Azubuike can carry the load inside, they could win him his second title.
Duke is very young and have no depth. Younger than they have probably ever been. One Senior (with attitude issues), one Soph (who has yet to produce), and a trio of superb Freshmen starting. After the starting five, they have Freshmen and Sophs who are not typical Duke level guys. The starting five has the potential to be outstanding. K is a great coach, obviously, and we should never count him out.
UK is super young. No Juniors or Seniors. Eight Freshmen and three Sophs. Two of the Sophs rarely saw the court (Killeya-Jones, Wynyard) last season. Only one part-time starter returning (Gabriel). They have no superstar inside player like they are use to having (Cousins, Jones, Davis, Randle, KAT, Bam). They have great size and talent on the wing. This team is talented and deep, though. Eight 5-stars and three 4-stars. Their top nine players were top 30 players in their class. They have size with ten guys 6'4 or taller, and seven players 6'8 or taller. They have a great coach, who is use to coaching Freshmen laden teams, so they will have a shot.
So it wouldn't surprise me if any of those five cut down the nets.
And this could be a year where someone comes out of nowhere and gets hot in March and wins it all. No truly dominant team this season.