Okay, let me put it this way.
The first frame introduces this world.
"In this world, trophies fight."
The following three frames introduce us to the trophies, and we know that they will fight.
"They know nothing but fighting. Fighting is the sole reason for their existence."
The following frame shows two trophies ready to fight.
"Being turned back into a trophy, being unable to fight, is much like death."
It shows Kirby as a trophy. Then we see Kirby as a living being again. It shows that Kirby is alive. Three frames here.
"Those are the rules of this world."
It then goes to a shot of Mario, who looks at the coming threat.
"But..."
It then shows the Halberd from which, as we by now know, the purple guys come out of.
"When someone...or something...breaks those rules, the world will pay a terrible price..."
It then shows a purple guy.
Okay, first of all, how many frames separate the last line from Kirby and Mario shaking hands?
Now, let's draw a parallel to other games. When something is about to happen, do the actions of the citizens mirror the upcoming threat?
I mean, do we actually see, in the intro, that someone screws up, leading to mass destruction? Rarely.
Like somebody said, Super Smash Bros. is an ordinary game. It will follow the clichés of storytelling. A good story never reveals who or what screws up at the beginning, unless it's a history of how the world came to be dark. That IS the most single rule to a good story.
Enchanted Arms didn't show the world in chaos until after the Atsuma encounters the Queen of Ice. Team Magma didn't resurrect Groudon until after you've encountered him. Heck, I bet even God of Wars wasn't as screwed up to put the "you've just screwed yourself over" moment precisely at the beginning of the intro. At most, somewhere in the end. Now I haven't played God of Wars, but I have played other games in which the main character screws himself over, or some other force. And they never do it during the beginning of the intro.
Also:
Rulebreaking = nonexistent, because Sakurai created a red herring.