The Infinity Saga is responsible for putting the MCU‘s new Avengers in a very worrying position. The MCU’s Infinity Saga comprised its first three phases, ending with Avengers: Endgame and Spider-Man: Far From Home before Black Widow would launch the movies of the Multiverse Saga in MCU Phase 4. Black Widow would then kick off a string of movies that grossed around the same as the earliest movies of the MCU, though still falling short of the $500 million and $450 million grossed by Iron Man and Thor, respectively.
https://screenrant.com/mcu-avengers-5-lineup-multiverse-infinity-saga-problem/