Leanardo/James Cagney resemblance

When I looked at a picture before of Leanardo Decaprio as Hughes, I thought that that he really also sorta looks like James Cagney. They should've made a movie about Cagney with Leanardo. They should also have Gwen Stephanie play Jean Harlow again, since her portrayal of her was pretty good in "The aviator" (although they made her eyebrows too dark, Harlow had very light eyebrows). And also because she starred with Cagney in several films including "Public enemy".