Exactly, he knew he was going to get a second. So with that knowledge, why did fans excuse him with "oh, he just deleted that to save it for the next one." And it's the same excuse now with MJ, "oh, he just deleted that to save it for the next one." On ASM3 are we going to also have, "oh, he just deleted that to save it for the next one." Fool me one, shame on me - fool me twice, I'm just not buying into it.
And it's really rather simple and fundamental that what you are proposing would never happen. As said, in order to have a death you don't just plop it in there. Nobody does that. You have themes, arcs, foreshadowing, and everything leading into pivotal moments. Films aren't just random events that happen, then it would feel out of place.