Reports suggest that Marvel's Thunderbolts will be abandoning its original bombshell of an ending, which is a shame because the MCU has already proved how well this type of ending could work. Reportedly, Thunderbolts was going to have a surprisingly tragic ending for an MCU movie. Since then, Marvel has seemingly decided to change some elements of the film's script. While this will probably make Thunderbolts a cheerier viewing experience, it is also missing out on the opportunity to recreate one of the MCU's best endings.
https://screenrant.com/thunderbolts-ending-sad-avengers-infinity-war-repeat/