what i dont get though is, what is Sandmans motivation for being there?
the trailer conveys him as a petty crook who just happens to be involved, what reason will he have for being at the construction site? unless ofcourse he is the firts character there.
and as for Spidey reaching i believe its a reach for life, for somthing to get him out of the predicamnethe is clearly in. from that position he is starining to hard to be reaching for help and i dont think he is really in any position to save anybody
as for the 'i need your help' bit i think it is Harry, the trailer tries to make it look like its MJ, if it didnt everbody would assume harry and lets remeber these trailers generally arent designed to be scrutinised and watched over and over. in a theatre with one viweing it would look like he is talking to MJ to the general public. that would mean him talking to Harry would be a surprise to them seeing as there is no other hints in the trailer that Harry will truun good.