getting back to the subject of spidey

with SM4 it's essential that the quality (story/plot) is back on track to the level of 1 and 2 because as you are seeing with POTC you can only burn the audience once (or three times if you are lucas)
I think its like this; you watch a movie and if its terrible but you like the previous movie you are on the fence whether you want to watch the next sequel if enough people tell you the new sequel is rubbish you don't bother to watch it, and if enough people tell you its really good you go to watch it because of your memories of the good movies.
examples
matrix
great first movie
second movie (terrible) - massive hit (because people remember the first one)
third movie (terrible) - okay numbers (possibly hit because of WOM)
POTC
great first movie
second movie (terrible) - massive hit (because people remember the first one)
third movie (terrible) - okay numbers (possibly hit because of WOM)
imho if spidey 4 does't achieve critical accliam from plublic and press alike it will suffer and wont achieve any thing like the previous three movies