This powerfull and rich orchestrated short piece works very well for large hollywood type opening sequences that need a heroic or an epic feel (epic in the John Williams sense of epicness).
It includes a tension building beginning part utilizing woods and pizz strings, a cinematic brass fanfare as middle part and a lush string and woods chord as the ending cadence.
The use of this piece is of course not limited to hollywood opening scenes or logos. If it is well placed in editing it can function as an entrance fanfare.
Included versions in order of appearance: Long version: 0:33 Middle version: 0:24 Short version: 0:16 Very short version: 0:15
Not quite the right sound for your opening?
This one will work: