The MCU's Thunderbolts* movie receives a subtle title change in the form of an asterisk, which suggests several possible meanings and implications for the Phase 5 movie. Directed by Jake Schreier, Phase 5's upcoming Thunderbolts is the Multiverse Saga's first full-fledged team-up movie, gathering a group of anti-heroes that serve as a more ambiguously moral version of the Avengers. Although the MCU Thunderbolts' line-up is very different from most of its comic-book counterparts, it still draws inspiration from the source material for its name.

https://screenrant.com/thunderbolts-new-title-update-asterisk-what-it-means/