In the case of this particular action figure, the gimmick appears to be that the head and hands are removable and can be replaced with other options.
Needless to say, the idea that kids will be able to pull of Brie Larson’s head is slightly disconcerting for the actress.
Why would the figure need a second head anyway?
In all likelihood there will be more action figures of Captain Marvel than Brie Larson will know what to do with, each with a different look, different gear, or some special thing about them that will make each unique and try and get fans to buy them all.