From A Wiki of Ice and Fire
Harrenhal is an upcoming A Song of Ice and Fire Broadway play written by Duncan MacMillan.
The development of the play was first reported in March 2021. Developed by George R. R. Martin, written by Duncan MacMillan, produced by Simon Painter, Tim Lawson, Vince Gerardis, and Jonathan Sanford, and directed by Dominic Cooke, it is expected to make its debut in 2023.
The plot centers around the tourney at Harrenhal in the year of the false spring.