There are a lot of important characters that are very important to Marvel comics and still didn’t make their debut in the MCU, such as Spider-Woman, Sentry and Tigra.
Sentry was rumoured to appear in the future, maybe in a Dark Avengers project, Spider-Woman is rumoured to gain an own MCU/Sony project but Greer Grant/Tigra was never rumoured to appear in the franchise.
When movie or series do you think that Greer could make her debut in the MCU, I would like to see her in Moon Knight as Marc’s love interest. She could be experimented by the government to become a human/tiger hybrid to defeat the series’ big threat. She could join Marc in the fight against the antagonist and could be his love interest.