Jack Reacher and Max Payne were titled because they were based on original source material that the filmmakers assumed would draw in their fans. Jack Reacher was a series of books and Max Payne was a series of Video Games. Criticizing those titles doesn't make sense because the heroes of the books or VG series is a normal way to title a movie. Ironman was the name of the Super hero of the comics (his alter ego was Tony Stark). It made sense to title the film that way.