Here is my quick, dirty, and literal translation of the whole page. Yes, they are that vague about some of the details.
[top left, gold text]
The great adventure of dreams and bravery are resurrected on the Wii!
[top left paragraph with two arrows and pictures]
One night, in a mysterious world she ran to after being attacked by nightmares, Helen met NiGHTS. How is this young girl, who is coming into her womanhood (lit. puberty), going to change here in the world of dreams?
Has her guilty conscience given birth to her nightmares?
[vertical text in top right w/arrow]
While the violin concert of her dreams is right around the corner, Helen wants to distance herself from both her mother and performance.
[vertical purple text beneath last text]
How will Helen change from the adventure in Nightopia?
[big blue text in middle]
A great adventure with NiGHTS and a young girl coming into womanhood!
[Place with Helen's name in English and info boxes, lower right]
Special ability: Violin
Helen lives in a quiet residential area of Bellbridge. Starting from a young age, she got her mother, whom she is very fond of, to teach her violin performance. However, now that she is hitting puberty, she is wanting to distance herself from her mother and performance. Because of the guilt she feels from this, she has started to have nightmares.
[box where you can see "wii" in English w/gold lettering, and the paragraph beneath it]
Exhilarating action with the Wii remote!
The attractiveness of Nights is the number of action-acrobatics which NiGHTS, and the characters fused with him/her/it, show you. This attractiveness is doing well in our game! By just memorizing simple controls on the Wii remote, you can enjoy the exhilarating action where you fly around just as you remembered it.
[beneath last text, with an arrow pointing to a picture]
Nights, holding onto the tail a Nightopian in the shape of a bird. Use the "touch-dash", one of your mid-air moves, to take it out.
[the lower-left-most text on the page, points to picture]
A light [trails] behind Nights like it is following him. When you make a circle with this light, you make a paraloop, and you can destroy enemies that are gathered inside of it.
How will you control it?
The combination of free-form mid-air action and the Wiimote's controls seem to go together well.
[lone purple text to the left of the above]
Let's enjoy exhilarating action with intuitive controls!
[lower-right-most text with a pointer to a picture]
In the last game, you could enjoy doing acrobatics by [pressing certain buttons] while in mid-air. In the new game, we should be able to have a great variety of actions with the special features of the Wii's remote!
Let's run around the sky freely!
Development progress: 50%
In place of Claris and Elliot, whose bravery was the theme of the last game, it is written that this time, the story will be about Will and Helen, with the theme of accepting family. Please have high hopes for their [adventure].