Looks like Wiseman's another Oden. The guy has only been in the NBA for 4 years but already has an impressive list of injuries in such a short period. Moreover, Wiseman already had a serious injury early in his career - a torn meniscus, and he missed a lot of games because of it. Now he has an even more serious injury, and I agree with you that this is most likely the beginning of the end of his NBA career.
Yeah, when he was with the Warrior, there are a lot of prospect on him as he could be the one to help them win more rings or at least be there for them with him and Looney at the center position. But he had a rough time with the Warriors because of injuries and so I would say that the Warriors had made a good decision to let him go and trade.
And now he is injured again, it could be season ending for him. We don't know if he can come back with the same hype and athleticism as this kind of injuries might also lead to career ending just like Greg Ogden another big man.