Nike is facing plenty of challenges this year.A glut of sneakers and sports clothing has built up in recent months, leading to concerns that Nike will have to heavily mark down prices on shoes and sportswear if it wants to sell them during the competitive holiday season. That has taken a toll on its stock, which has fallen 41 percent in the past year.Then on Thursday, one of the superstar athletes with whom Nike partners, Kyrie Irving, was suspended by the Nets after he posted a link to an antisemitic film on social media.A day later, Nike suspended its relationship with the basketball star and said it would not release Mr. Irving’s new shoe, the Kyrie 8, which was supposed to hit the market on Tuesday. Nike has produced the shoe since 2014. The company does not disclose exactly how much revenue Mr. Irving’s shoes bring in, but it is only a fraction of what the company earns from its ties to other notable stars, especially the basketb …
