Phish broke from the costume part of their costume album tradition on Halloween 2013. Rather than dress up as another band for their second set, they debuted 12 new songs under the banner of Wingsuit, "an album from the future."
Much more information can be found in the program distributed to attendees at Halloweens since 1996, a cheeky parody of Playbill magazine known as Phishbill. Here's a PDF link to the 2013 / Wingsuit edition.
Encore: Quinn the Eskimo
 Debut; Acoustic.
 Debut; with Abe Vigoda and the Abe Vigoda Dancers.
 Phish Debut.
 Alternate lyrics referencing the Abe Vigoda Dancers.
Average Song Gap: 7.84
Notes: Breaking with tradition, Phish donned a musical costume "from the future," a yet to be recorded album that will apparently be entitled, Wingsuit. All of the songs in the second set were debuts other than Winterqueen, which was played by TAB on October 1, 2011. Monica, Snow and Amidst the Peals of Laughter were all performed acoustic, and Amidst the Peals of Laughter was performed as a Page and Trey duet. Wombat featured the dance stylings of Abe Vigoda and the Abe Vigoda Dancers. Antelope also featured alternate lyrics referencing the Abe Vigoda Dancers. This show was officially webcast via LivePhish.com.