ɪn tˈuː θˈaʊzənd twˈɛnti wˈʌn, hˈæm ɹᵻtˈɜːnd tə ðə nˈaɪntiːnhˈʌndɹɪd ˈeɪɾi nˈaɪn bˈætmæn fˈɪlm jˈuːnɪvˌɜːs wɪððə lˈɪmɪɾᵻd dˌiːsˈiː kˈɑːmɪks sˈɪɹiz bˈætmæn ˈeɪɾi nˈaɪn, ɐ dᵻɹˈɛkt kəntˌɪnjuːˈeɪʃən ʌv bˈoʊθ ðə nˈaɪntiːnhˈʌndɹɪd ˈeɪɾi nˈaɪn fˈɪlm ænd bˈætmæn ɹᵻtˈɜːnz.
In 2021, Hamm returned to the 1989 Batman film universe with the limited DC Comics series Batman '89, a direct continuation of both the 1989 film and Batman Returns.