None. All the players are already entrenched.
Same modus operandi was at play in the false story about TEA Party members (or even infiltrators in the crowd) shouting "nigger" at a couple of congressmen. Total fabrication, fiction, published as fact (using the magic word, "alleged") by the media; and as far as I know, the false narrative still lives.
A finding that Zimmerman was justified will be described as "incendiary," rather than as a good call. The media will downplay the facts as it builds its false narrative.
I am aFRaid that you are absolutely correct.
The story is written — all the “facts” will be presented in such a way as to support the narrative already presented.