Just as I always thought: It is the same guy talking on all those movie previews:
The question of narration is a tricky one, thanks to Don LaFontaine, who is lovingly referred to in trailer circles as the 'Voice of God.' You've heard him. A veteran of 40 years and more than 4,000 trailers, his rumbling basso has enticed millions with dramatic intonations like 'In a world where . . .'