Good point. Those characters would have to have been already established for that kill scene to have an impact on the audience. Of course the football scene could be split. The first half of it where the stadium erupts and Bane comes in could be in the prologue, but stops before Bane kills the scientist.(obviously this means the film would be somewhat non linear).
Then after the prologue the film goes back a couple of days, or week, or what ever, to the start of the present story line. Then it builds its way back to the football scene starting off where we left, finishing with him killing scientist, whom we would know at this point, because in between the first half the football scene and the second half, that character would be establish.
But that sounds too overcomplicated, so yeah probably not going to be it.
Oh who knows, maybe the scientist does die in the prologue and Nolan just rolls like that. lulz
