Thing is, while Shattered Dimensions was one of the best Spidey games from this gen... I didn't really feel like Spider-Man. There was no weight to him or... well, anything.
Now, in Arkham City (OMG GUISE, I'VE BROUGHT IT UP! ;O)... you actually feel like you can really take advantage of Batman's abilities. Hell, I said this before, I think it's sad that I've felt more agile as Catwoman, than I have as Spider-Man in a Spider-Man game from this gen. :\
From what I've seen in the trailer for this game, Spider-Man actually moves like Spider-Man. It all looks fluid and dynamic. Exactly how a Spider-Man game should play, so, fingers crossed.