On May 15, the Second Circuit heard Yang v Kellner, 20-1494. This article describes the 90-minute hearing. The article makes it sound as though all three judges will agree with the U.S. District Court that New York can’t cancel its presidential primary.
https://www.detroitnews.com/story/news/politics/2020/05/15/appeals-judges-seem-apt-let-presidential-primary-proceed/111784244/
AP story