In recent years, Robert Downey Jr. has consistently been one of the highest paid actors in Hollywood. For the most part, that's because he was at the center of the Marvel Cinematic Universe as Iron Man. Downey helped launch the franchise, so it's not exactly a surprise that they paid him well to continue appearing in films.
Now that he's done with the Marvel universe, though, where will Downey's career go from here? His first attempt at a movie outside the franchise didn't go all that well.