Quite nice
but a lot of the animation was just tweened images. It can work quite well if you do that for a montage-style effect, but for fight scenes I think you really need some more frame by frame, or at least individual body parts tweened as opposed to the whole body. I saw a couple of better points such as the end of the Doc Ock fight which was done very well, but some of the others looked a bit odd, particularly when Spiderman punches someone and then returns to something like a casual, nonchalant stance - Spiderman should be ready all the time, especially in a fight.
Nice none the less, good job squire.