Re: Most disappointing comic-book movie
Hulk by Ang Lee, after Spider-Man and X-Men the Hulk was like Marvel's #2 superhero that the expectations for a live action CGI Hulk were very high that in the end while decent acting by some Nick Nolte's crazed David Banner didn't make any sense especially the end interrogation when he just goes ape ***** in the military compound.
As for second tiers like Elektra, Ghost Rider, Catwoman, Fantastic Four their poor performances weren't surprising since they're terrible characters to begin with.
A few of the Marvel Superheroes are somewhat niche characters that aren't extremely versatile, thus they don't have a lot of longevity potential. For example, Namor is a water guy, Silver Surfer is a space guy, Dr. Strange is a magic guy, and so on.