That guy did an absolute ton for nature, his was a face that almost everyone in the world knew. Yes, he lived on the edge and died doing what he loved. Beats slowly dying of some disease, a sharp spike right through you heart, that's quick and to the point that's for sure.
As for the footage, I'm sure they will show it, after all it is nature, I'm sure Steve himslef would say "show it", why would they not? I mean wasn't that the point of most of his shows, we humans try to "clean it up", he swam to close to the stingray, the stingray was protecting himsel;f, and Steve died.....that's nature!