These are two recently released teaser trailers for the upcoming instalment of the Superman franchise. They are pretty much the same things, the only difference being the voice overs. One of the voice overs is done by Kurt Russell as Jonathan Kent, Superman's adopted human father. The second trailer's voice over is done by none other then the Gladiator himself Russell Crowe, playing Jor-el Superman's (biologic?) alien father.
Jonathan Kent Trailer