Turns out Miss Dream has scans of the novel up on their website, so as I did with Naoko's recent interview in FRAU magazine, I thought I'd attempt a translation via OCR and Google. Here's my summary of chapter 1:
The novel begins, naturally, covering the opening scene of the girls attending the game show and trying out the different video games ("Welcome to the Game Show"). It's pretty straightforward, but we get this bit of background information that isn't mentioned in the musical itself:
Turns out people all over Japan have been experiencing inexplicable, extreme fatigue and deteriorating physical strength for the past six months.
Young people in particular seem to have been affected. Recently, half of the students at Juuban Junior High School were too tired to get out of bed and had to miss classes. Doctors seem to think a virus is to blame, but Ami, who's been interested in investigating the bizarre phenomenon, has another idea:
A chain of DVD rental shops, "Rental Shop Dark," seem to have popped up all over Japan practically over night, and Ami suspects that they're responsible.
While passing by the shop near her apartment building on her way home from school one day, Ami was given a complementary/promotional DVD. As soon as she put it in her computer and pressed play, she felt a strong, evil energy flowing out from the screen and quickly turned off her computer. As it turned out, all the students who had been too tired to go to school had gotten copies of the DVD from Rental Shop Dark the night before.
Furthermore, the free DVD came with an invitation to attend a special, "girls only" game show sponsored by the Dark Company. Ami got the girls together and they planned on attending in order to investigate further.
So yeah, pretty interesting. Explains why they were attending the game show and gives a bit of background as to how long the Dark Kingdom has been stealing energy. I love how Ami is the one leading the investigation, and I think the nod to Act 7 with Rental Shop Dark is interesting.
Anyway, after each of the girls has played a video game and beaten it (except Usagi), they go off and investigate the venue.
(*Instead of the Momoiro Clover Z romance advice phone app, Minako plays an idol simulation game that involves singing and dancing, which makes a lot more sense. Also, Ami only plays the Tetris game reluctantly since she just wants to investigate, and she even chides Rei for saying "Akuryo Taisan" since it might give away her secret identity.)
An hour later they meet up again. None of them have noticed anything strange and Rei hasn't sensed anything evil. Ami apologizes for bothering them with her crazy suspicions, and the girls decide to just enjoy the rest of the day at the game show.
Just then, the husky voice of the event's moderator echoes from the main stage as she announces the Dark Company's new game, "Pandemic Love." After a brief demonstration of the game, she introduces that "Pandemic 4," the characters from the game, have become a real idol group who are there to perform their debut single, "Erosion Boy." Pandemic 4 appears on stage. Ami is confused at first by how much they resemble the characters in the game, but then realizes the game characters were probably designed to look like them, not that they were chosen because they looked like the characters. Anyway, they perform their song and Ami seems to be the most affected/fascinated by it. The book mentions the song's "mysterious sounds" which Ami had never heard before, and its fascinating "ethnic melody and irregular rhythm."
As Zoisite sings his solo, Ami feels a curious sensation. Their eyes meet and "at that moment, something invisible passed between them. Something pierced through their bodies like lightning." She barely noticed the other members; for her it was like time stopped.
The song ends and Jadeite blows Rei a kiss. He, Zoisite, Nephrite, and Kunzite introduce themselves and then pass out free copies of the game to all the cheering girls in the audience. The game show comes to an end and as the girls leave, Ami feels Zoisite's eyes on her, but she's too scared to turn around and return his gaze.
That's all for chapter 1. I like how the novelization adds some background info to the story and develops Ami's character and her and Zoisite's mutual attraction from the beginning. So far it feels like a more polished version of the musical, and I can only imagine that had there been a revision, it would have taken some cues from the novelization.
I'll try and do chapter 2 tomorrow (if no one else wants to give it a go).
but it'd still be cool to look at. 
but I suppose if they aren't active...?
She has strangely glowing eyes, long fingernails, a narrow mouth like that of a small animal, and seems no longer human. Hers is a terrible voice, surprisingly dark and cold. She is "a queen of tragedy who could not become the Earth's queen back in ancient times." With her long, bright red hair, she had been born and raised in the royal family, and had once had the sophisticated appearance of royalty; now she had only the mysterious and horrible face of one who had sold their soul to the devil.