This coming year has with very high probability always been a team-building year. I don't mean just recruiting although that is the single biggest factor. I also most certainly don't mean that the coaching staff will be shooting for good-but-not-great results in the coming season as the price for reaching a much higher level in the following season. All coaches at this level try to win as much as they possibly can every single year: winning culture is founded on that.
My point is that in listening to players at the NBA and collegiate level talk about how long it takes to build a team (Nicola Jokic is compelling in crediting even former team mates, for example) -- which involves adding a guy here, developing a guy there, carving out durable roles that hold up through the wicked onslaught of bad-luck in shooting (each game matters so much at the NCAA level) and matchups and reffing and off-the-courts issues -- is a task that usually take seasons and not merely months.
Guys learning to read each other on the floor, leaders understanding what leading actually involves, guys coming to be proud of the role they have carved out for themselves on the team, coaches developing confidence in their guys which makes players thrive, that all grows from repetition in practice and games and end-of-game situations and in losing situations. Talent and god-given physical gifts are not going to alone overcome the time factor though it can be shortened some for sure.
What's the point I am making? I suspect Coach Underwood will have the goal of winning the B1G championship this year and to make a serious run in the NCAA tournament. I would be stunned if he backed off from that mindset at any point in the coming season short of something like catastrophic injuries. But in the back of his mind, he knows if this current roster -- which needs to be molded into a team by him, his staff and the guys themselves -- tastes success this year and largely stays together, then the following season will be the when the big payoff will arrive.
That's my read.