The briefing is almost complete in Seila Law. v. Consumer Financial Protection Agency. In that case, the Supreme Court will consider whether the structure of the CFPB, which was established by the Dodd-Frank Wall Street Reform Act of 2010, violates the separation of powers because the agency has a single direct who is removable by the president only for cause.
The parties' briefs and a slew of amicus briefs on both sides (including Public Citizen's brief arguing that the CFPB's structure is constitutional) are available here. The petitioner's reply brief is due in a few weeks, and oral argument is set for March 3.