United States v. Vaello-Madero, the case on the constitutionality of denying SSI to U.S. citizens who live in Puerto Rico, has been relisted by the Supreme Court, meaning that the Court will consider again on Friday whether to schedule the case for oral arguments. My understanding is that relisting like this is common in cases that the Court eventually agrees to hear. However, it would also be possible for the Court to summarily reverse the decision below without an oral argument.
If the Court does decide to hear the case, there is the issue of when it gets heard. The Court's argument calendar for this term is nearly full. If it gets heard in this term, we get an opinion by early July at the latest. The Court's new term always begins on the first Monday in October so if it gets pushed into the next term we're not likely to get an opinion before early 2022.