Batman fans there will be a "Pop Up" event in London from the 15th-17th September with props & costumes from the movies
https://www.warnerbros.co.uk/news/articles/2023/08/21/batman-day-2023-introducing-batman-unmasked
Strange address - from all the restrictions (no cloakroom, no food or drink available, no toilets) and that numbers don't go as high as 180 on Piccadilly, I'm guessing it's going to be some sort of marque in Green Park.