Wemby is currently an asset for the Spurs, but they had a rough last season, so they're eager to come back strong. Injuries are unfortunately a part of the game, and you need some luck to avoid them. Wemby is a big guy, and it seems like big men, when they get injured, tend to have a tougher time coming back quickly. Sometimes, they even need an entire season to heal, just like Davis, or Chet, who missed the entire season when he got injured during a preseason game, if I recall correctly.
Let's cross our fingers that Wemby stays injury-free because injuries can really dampen the excitement and fan expectations. Even though the NBA remains entertaining, it's a different kind of entertainment when all the teams with superstars are healthy and competing throughout the season.
Honestly expecting Spurs to be great on year one is delusional. Sure Wemby is a generational talent and there is nothing wrong about expecting to do a lot better, but they have basically nobody else at this point. Look at their roster, it is as open as it gets and I would change everyone aside from Wemby if given the chance. They are not that type of team neither, not like they are known to get greater with trades and free agents, not an amazing destination to live neither, and small market as well.
So, I am assuming that, they are going to be a little different. Look at Dallas, they got Doncic, near MVP level player for years, and they still haven't been good just yet, they might, but not yet. Wemby is like that too, they may need some time, hell Jokic and Giannis took so long to get their title as well. So do not expect them to suddenly be great, that's not going to happen, we are going to see them get better, but not right away and not a lot.