 Shipp later reprises his role as Barry Allen / The Flash from the 1990 television series in the crossover "Elseworlds," retroactively establishing this iteration of the superhero as an Earth-90 counterpart of Jay Garrick and Earth-1 Barry's father Henry Allen.Ezra Miller reprised his role as the DCEU version of Barry Allen in the Crisis on Infinite Earths Arrowverse crossover.On February 3, 2016, it was announced that Gustin would appear on the "Supergirl" episode "Worlds Finest", due to "Supergirl" existing in the Arrowverse multiverse.