Todd Jensen writes...

This is probably going to reach you such a long time from now that the "freshness" will have most likely gone out of it by the time that you read it, but:

You raised the question as to what happened to the Elves who fought at Helm's Deep in the movie version of "The Return of the King". My own impression from the "Two Towers" movie was that they were all slain during the battle(except for Legolas), of course. Admittedly, they didn't refer to it in the dialogue for the "Return of the King".