I saw a trailer of a movie in the theatre about dead people who died then they were like being dropped at a seashore on another planet. I want to know the title of the movie

THE QUIET EARTH (1985) ?
The Quiet Earth (film) - Wikipedia, the free encyclopedia

I watched the trailer at YouTube for The Quiet Earth. That's not what I've saw in theatre and I don't think that's the film. The trailer show who had died were like being transported to another planet and being dropped at a seashore. And there are many people, not just one.

Possibly Riverworld.
trailer - YouTube

Any chance it was this?
Riverworld (TV 2010) - IMDb
(but this was a made for TV pilot, not sure if it would have been advertised in a theatre... )
(Ha! Didn't see Quinns post... )