>>126346521Black Panther is easily one of the biggest examples of that. Of that original Avengers from the eponymous film, only Hulk was a very well-known character. The other 5 varied from "oh yeah, Batman with no hand-to-hand abilities but also in a metal suit" to "purple archer".
Hell, the entire roster of the MCU can be considered as vastly boosted in notoriety with the exception of the aforementioned Hulk as well as Spiderman.
Marvel Studios must be sporting a chubby for when they can incorporate Fantastic 4 and the X-Men.