New Narnia. I must see that. I haven't heard anything here in Greece about it. Maybe because all the movies come here after they are released in America.
About your problem, I don't think your friends care about the reviews or any argument you may have about the movie. I have faced a situation like this numerous times. I suggest you tell them kindly and calmly that it would be better to see both movies. If the majority of them wants to see Hancock, then there is no way you can avoid watching it. You will only have fights so just see both and it will all be fine. And you don't know, you may enjoy Hancock.