I say no! When you think about it, most of the roles in TASM can easily be replaced by new ones in the sequel, without adding much screen time. For example, Captain Stacy's screentime could be used for Harry Osborn in the sequel, while Electro would obviously take Connor's. Plus, Spider-Man doesn't need an origin anymore, thus that time could be either used to develop Peter further or some other character. Mary Jane will possibly have as much as Flash had in the first film. You can apply that logic to the third installment as well. In my example, we'd basically have the constellation of Raimi's "Spider-Man" so far, not knowing what secondary villain could be used (maybe slowly introducing the symbiote for the 2nd reboot-trilogy??). MJ would take Gwen's place, assuming she's going to die at the end of TASM2. What do you think? Do we really already have too much crammed into the sequel? Or will it all play out well in the end?