Fantastic Four: Rise of the Silver Surfer is another sequel (2005’s Fantastic Four.) heading to theaters this summer, with a planned release of June 15th. This time around the team (including the always beautiful Jessica Alba, of course) will have a new enemy and a new challenge to save mankind!

Marvel’s first family of superheroes, The Fantastic Four, meets their greatest challenge yet in FANTASTIC FOUR: RISE OF THE SILVER SURFER as the enigmatic, intergalactic herald, The Silver Surfer, comes to Earth to prepare it for destruction. As the Silver Surfer races around the globe wreaking havoc, Reed, Sue, Johnny and Ben must unravel the mystery of the Silver Surfer and confront the surprising return of their mortal enemy, Dr. Doom, before all hope is lost.
- 20th Century Fox

Anyone familiar with the comics will recognize that the Silver Surfer showing up at your door is definitely not a good omen. Wikipedia has a great entry on his backstory:

The Surfer was originally Norrin Radd, a young astronomer of the planet Zenn-La. He agreed to serve as herald to the god-like entity, Galactus, in order to save Zenn-La from the world devourer’s insatiable hunger. Granted enormous powers (he wields the Power Cosmic), a silvery appearance and a surfboard-like vehicle — all of which were modeled after a childhood fantasy of Radd — the Silver Surfer roamed the cosmos, searching for new planets for Galactus to consume.

I’d recommend not reading more than that excerpt though if you don’t want spoiler details. If you already know the story or like spoilers, then you can check out the Silver Surfer’s Wikipedia entry.

Enjoy the Fantastic Four: Rise of the Silver Surfer trailer here: