DC Universe Mini Figures & Cards are available at participating Wendy's locations in the United States from September 4, 2023, until supplies last. The series features 18 different DC Comics heroes and villains. Customers receive one box with the purchase of each Wendy's Kids' Meal. Each blind box contains three mini figures and three mini collector cards. Each mini figure is available in four different colors: red, blue, green, and purple. The rubber mini figures are similar to Japanese Kinkeshi and M.U.S.C.L.E. toys.

The series was produced by Strottman International. The characters were designed and illustrated by Matt Kaufenberg. The inking and character backgrounds were done by Chris Lee. The mini figures were sculpted by Bigshot Toyworks. On September 14, 2023, Bigshot Toyworks previewed a glow-in-the-dark Batman figure and foil-stamped trading card.

Warner Bros. Discovery Global Consumer Products and DC Entertainment partnered with Wendy's to support the Dave Thomas Foundation for Adoption. DC Super Heroes Boo! Books are available at participating U.S. locations from September 4, 2023, to October 31, 2023. Each $1 book contains five coupons for a free Jr. Frosty treat, plus a sixth bonus $1.99 Kids' Meal coupon. The coupons are valid through December 31, 2023.

For each Boo! Book sold, 90 cents will be donated to the Dave Thomas Foundation for Adoption. Boo! Books can be purchased in bulk online directly through the Foundation. The 2023 coupons feature Wendy's Frosty characters dressed as DC Super Heroes: Batman, The Flash, Green Lantern Jessica Cruz, Superman, and Wonder Woman.

Pre-orders for DC Boo! Books collectibles began on August 4, 2023, from Elk Promotions, Inc. Three different t-shirts featuring Batman, Superman, and Wonder Woman were available in limited quantities. "Hall of Justice Halloween Party" Boo! Books sticker sheets were sold separately for 85 cents each. The sticker sheet features thirteen different Frosty characters. The Batman, Superman, and Wonder Woman designs appear in a three-piece lapel pin set.