Tell me that people don't want to read superhero comics, and I'll throw Watchmen in your face.
Bookstore sales (and, for a period, hyped by a movie that drove a lot of new people into comic shops), which are rather different from shops; Marvel maintains visible collections in those, though there are no reliable sales figures for them.
Also, in Watchmen's case (and with other specifically-adapted GNs like 300) there's a single, specific book to buy, not scores of potential Spidey trades that aren't direct sources for the film.
Tell me that they're not willing to go to comic stores to buy them, and I'll throw the Obama issue of Amazing Spider-Man in your face, which is STILL selling a few thousand NEW REPRINT copies each month, in spite of the fact that all the following issues' sales have continued to go down.
That's marketed as a special collectable.
Tell me that kids today just aren't into reading as much, and I'll throw Harry Potter and Twilight at you.
Kids aren't into reading as much today. Those are exceptions; there will always be those.
Tell me that superhero comics don't have enough mainstream media exposure, and I'll throw the latest SDCC, Colbert's constant Marvel references, Quesada's countless mainstream media news interviews, and the RECORD-BREAKING box office of the Spider-Man movies at you.
SDCC is primarily about film and TV these days, despite its name, as has been widely remarked upon; Colbert is one show with a fairly small (though influential) audience, and Quesada's occasional interviews certainly do provide visibility; what does the success of the movies have to do with people wanting to read comics again?
Really, though, you just want him fired.
As for revenues, the just-released Q2 numbers show Marvel's publishing weathering the recession decently (down about $100,000 (31.8 to 31.7 million) compared to last year, down 7% in "operating income, whatever that means). That's pretty solid, I should think.