Weren't you the one just complaining that the new film felt too serious and not lighthearted enough? The sense of humour is a character trademark. Leaving that behind betrays the very nature of the character and what sets him apart from so many other heroes. Its part of what makes him appealing in the first place. This isn't about being slavishly faithful to the source material, but when you can't bring the key aspects of the character to life, you have faith in your adaptation. Its absurd to suggest that a wisecracking hero doesn't work on film, when its been done time and time again. EDIT: I also don't see what is unrealistic about someone using humour to deal with stressful situations.