The site was probably created by someone at Warner Bros., who's intention was to promote the new Man of Steel release. But there also seems to be plenty of content that introduces more information about Kryptonian life and what we might expect in the future...
Learn About Krypton features videos and images that describe Krypton's culture. There are some awesome videos in there, including a faux documentary-style vid which teaches us all about the 'mysterious' planet from which the Man of Steel hails. This one's particularly interesting, because the narrator hints that you classic Supes fans might be able to breathe easier - knowing that Kryptonite might be making an appearance, at long last:
Sources close to both the military and DARPA have indicated that the various weapons seem to be made from a microcosm of the materials from the planet.
That certainly sounds like it could lend itself to Superman's green glowing rock from his home planet. That's also what the movie's meteor crash hinted at, so that's what I'm rooting for! Were you annoyed at the lack of Kryptonite in Man of Steel, and would you welcome it's appearance in Batman vs. Superman?
Snyder's Man of Steel comes out on Blu-ray on November 12, and Batman vs. Superman is set to hit theaters in 2015.