When he bumps into Liam and Navid at the concert, Campbell calls them the caped crusaders, an allusion to Batman and Robin. Grant Gustin later played the eponymous superhero in The Flash (2014); in a crossover with Arrow (2012) and Supergirl (2015) in 2018, Barry and his friends visit Gotham City in "Elseworlds, Part 2 (2018)".