The first season of She-Hulk: Attorney at Law now has a definitive place on the Marvel Cinematic Universe timeline. According to some sample pages from the upcoming encyclopedia book Marvel Studios The Marvel Cinematic Universe An Official Timeline (via The Direct), the Disney+ show is set from 2024 to 2025.
Though Marvel has yet to officially confirm that a World War Hulk project is in development, it does appear to be the endgame Marvel's movie timeline is headed toward in regards to Hulk's storyline. That said, the exact reason why it would happen remains unclear for the time being.