A review of Batman/Superman: World's Finest #40 is available, with some outlets noting the issue features a fight night in Metropolis. The comic may also involve kaiju elements, as one outlet reports that the issue "goes full kaiju". Additionally, recent developments in the Batman storyline may involve a new symbol and a potentially game-changing weapon, though it is unclear how these elements relate to the specific issue of Batman/Superman: World's Finest #40.