Originality, all but original.

I watched the movie the Incredibles last night, and to my surprise, or lack of, I realized that the characters in the Incredibles are almost exactly the same as the fantastic four. In both movies there are characters with exactly the same abilities except one. There is a stretching character, a invisible/force field character, and a super strength character. The only difference in characters are that one can become engulfed in flames, and yet they both have incredible speed. Is the entertainment industry really incredible, or is it a copy of ideas that occurred twenty years ago. You decide.