I dunno. The Spideys are among my fav movies of any genre. The X-Men were really good. The Incredibles also pretty darn good. Hulk (and many will disagree) pretty solid (not the best admittedly). Then we have a bunch of average ones, like MIB and the Blades, which people enjoy watching, but don't break any new ground or aren't especially brilliant. Every genre has it's weak points. If you're looking at Daredevil and Catwoman and Elecktra as saying the genre is suffering, I think you have the wrong perspective. Here's how I break it up For the last 20-25 years. I'm sticking with Superhero ones, so films like The Ring and what's it's bucket about the hitman with Tom Hanks aren't on it. I'm sure I'm forgetting some, but I'll be reminded.
Very Good
Batman
Superman
Superman II
X-Men
X2
Spider-Man
Spider-Man 2
Hulk
Mystery Men
Hellboy
The Incredibles
Average to Good
MIB
Blade
Blade II
Batman Returns
(I haven't seen Blade III, but I hear it belongs on this list)
Flash Gordon
Teenage Mutant Ninja Turtles
Teenage Mutant Ninja Turtles III
Dick Tracy
The Phantom
The Mask
Bad or Worse
Punisher
1980's Punisher
1980's Captain America
Supergirl
Superman III
Superman IV
Daredevil (though I thought it average, I thought I'd grade tough)
MIB II
Catwoman
Batman and Robin
Batman Forever
Teenage Mutant Ninja Turtles II
The Shadow
The Mask II (come on, I don't even have to see it to know this sucks)
In the near future, I'm thinking we'll be adding Elektra to this last list if we're grading tough, but that Batman Begins will be added to the first or second lists (I'm being optimistic). Likewise, most people are still hopefull that Fantastic Four will be at least average.
By this reckoning we have a dozen bad movies. Two of which were straight to video (the 1980's Marvel flicks), so the producers recognized how bad it was before it was even released. And three of which (MIB II, Punisher, and Daredevil) could be argued up to the next level by some fans (I personally would only argue Daredevil up to average).
By this same reckoning we have 11 movies that are very good or better. I can see two of them being argued down to average (Hulk and Mystery Men) but I'm inclined to leave them where they are. Even if we do down grade them, then we're still, even being tough on the genre, looking at 14 bad to 9 very good. with between 11-13 on the average or so list (depending on how harsh we are with the very good ones, that means that there are almost twice as many average or better superhero flicks than there are bad ones.
I dunno, I think that's pretty darn good for comics translated to the silver screen. Most genres, I would argue, have much bigger percentages in the average or bad sections.
edit: fixed the name of Batman returns and a bunch of new movies I suddenly remembered. I also want to mention (once again) that I would pay big bucks if liscencing deals could be worked out for a Maximum Carnage adaptation with Spidey, Venom, and Carnage duking it out, with a preceding movies explaining Venom's origin somehow.
Does anyone know whether "Dark Man" was originally a comic and how many of those movies there were?