Walmart Settles Religious Discrimination Case. What's Next?

The majority of civil cases settle before they get resolved by a court. Many of these lawsuits settle before trial, although some cases settle after trial and during the appeals process. But it's rare for a case to settle after someone petitions the U.S. Supreme Court to review the case. Why would a litigant spend tens (if not hundreds) of thousands of dollars and years in litigation, only to settle a case after the highest court takes the case? One obvious answer is fear of losing the case, although there could be more to it than that.