On Sunday, Aug. 20 from 11 am to 4 pm, a party on "Ticketmaster Plaza" outside arena, hosted by Brooklyn Nets and (quasi-public) plaza's fourth (!) sponsor.

OK, add another event--a plaza event--to the August 2023 Barclays Center calendar: a party for Nets fans this Sunday, Aug. 20, from 11 am to 4 pm.

From a Brooklyn Nets email: 

In anticipation of the upcoming season, on August 20th, Ticketmaster and the Nets are hosting a party on Ticketmaster Plaza outside Barclays Center! The day will be filled with appearances by the Nets Rookie Class, free live performances by talent such as Lola Brooke and DJ Funk Flex, giveaways, and food that celebrates Brooklyn.

Note that, as I've written, its "our plaza" when the arena doesn't want to highlight the sponsor; otherwise, since the arena opening in September 2012, it's been New York Daily News Plaza, Resorts World Casino NYC Plaza, SeatGeek Plaza, and now Ticketmaster Plaza.