I look at this movie similar to where batman begins was when it came out. While not nearly as negatively received as batman & robin, spider-man 3 has a bad rep. And its only gonna be 5 years since its release compared to the 8 yrs between B&R and begins.
it's not the same thing at all.
batman begins:
1) BB was coming off the back of a movie that flopped, BADLY.
2) BB is coming off the back of a movie that was PANNED
B&R
metacritic - 28%
rottentomato - 13%
3) there was a seven year gap between BB and B&R (out of sight out of mind) and people's lasting memory of batman was a terrible movie that flopped.
4) the sales of B&R (video)were diasaterous, suggesting the public didn't want it in their homes.
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the amazing spider-man:
1) ASM is coming off the back of a movie (SM3) that was MASSIVE. the movie made more money than TDK overseas.
2) ASM is coming off the back of a movie (SM3) that recieved lukewarm ratings, it wasn't panned, the critics didn't 'HATE' it. check RT/metacritic
SM3
metacritic - 59%
rottentomato - 63%
3) ASM follows 4 years after SM3. spider-man is still fresh and relevent in the GA minds
4) the sales of SM3 dvd/blu ray (despite what some people would have you believe) was very strong indeed (stronger than Star trek for instance a movie some people on this board think will out sell TAS) which suggests the people weren't nearly put off by the movie as they bought it for their homes after the dust had settled.
BB and ASM not the same thing at ALL.
also it's worth mentioning that if TF3 is a massive hit then that will show up all the talk of 'a movie being panned critically affecting the movie that follows it' as NONSENSE and I think TF3 is going to be MASSIVE. if ASM is a good movie it will make loads of money regardless of what went before it.