The season finale of She-Hulk: Attorney at Law introduces the child of one of the original Avengers, Hulk's son Skaar, but Bruce Banner said in Avengers: Age of Ultron that he can't have kids. It's a very interesting twist to the story of Bruce's green alter-ego in the MCU, and the whole situation makes Bruce's statement from earlier appear false. Unless Bruce was only referring to himself when telling Natasha Romanoff that he can't have kids and live a normal life, and not that the Hulk couldn't.

The Hulk having a son is a game changer moving forward in the McU's Multiverse Saga, as Skaar's arrival could set up a World War Hulk movie and he might be a potential member of an MCU Young Avengers team. Regardless of this exciting reveal, it still brings on the question as to how the Hulk can have a kid, but Bruce Banner can't.