In that memory, The Flash unexpectedly dropped a name from DC Comics that may have revealed Batman’s future in the Arrow-verse.
The Flash explored the future in “Memorabilia,” but not quite in a way that the show has done before.
Team Flash’s mission to wake young Grace Gibbons and therefore appeal to Cicada as a father figure took them into Grace’s comatose mind, with the unintended effect of Barry and Iris winding up in one of Nora’s memories of the Hall of Villains in the Flash Museum.