Well, Stan Lee isn't going to be promoted saying anything bad about the product. Also after all the fights with Marvel the fact that he's back, seems to imply he's going to be getting a cut of the action from their products, and given that this game features characters he was involved with, he has a financial stake in the game.
I'm not saying what he's saying is wrong, just that the interview is pretty much what you'd expect, and he basically IS acting as part of the advertising as is mentioned. No real objection there though.
Truthfully though, I am seriously hoping they will be giving Iron Man's side a better (and less political/Bush bashing) treatment in this game. See, as things were ramping up part of the whole point was that neither side was wrong. As the event got going it turned into a political analogy and I didn't care much for that.
Then again, a lot of it comes down to the fact that I tend to like the characters tied to the pro-registration side (Iron Man, Songbird, etc...) better than a lot of the guys on the Anti-Registration side (though there are exceptions like Cap himself, and Iron Fist).
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As far as the game being a succesor to games like Double Dragon, not really. So far all the games in this series (X-men legends 1 and 2, Marvel Ultimate Alliance) were heavily inspired by games like Diablo. I'll also be blunt in saying that super abillities were more of a focus than the hand to hand (which was involved, but generally speaking only something your support characters did much, and something to fall back on if you ran low on energy).
Truthfully the only real "old school brawlers" I'm familiar with right now that carry on the Double Dragon tradition are things like the "Watchmen" games, and of course "Unbound Saga". Most of the ones availible out there are remakes (like Turtles In Time) rather than new properties.