The coin in the stage select picture isn't the coins you earn in the game, they are they 1P, 2P, 3P, 4P coins that you put on your character when you pick who you want to use. Since each player needs to vote for a stage to play, it shows your coin and which stage you placed it on.
Something I'm wondering about is, when a player gets d/c'd and the CPU takes over, how does that work? One of the other player's Wii's starts up its AI and then that Wii is sending TWO inputs online? I'm guessing it'll be a random level CPU, as well.
What about the item switch? How many items will randomly be turned off? Will there always be some items turned off? Can it turn off Smash balls? Can it turn off all the items?
If characters aren't being hidden online, I suspect stages will follow suit. If you wanna know all the characters and stages that can be unlocked, just go online on like the 2nd or 3rd day after Brawl comes out!
If you earn most characters through the SSE, how does that work exactly? You play through it once and you have 3/4ths of the roster? That seems pretty lame. If there are lots of branching parts like choosing between Zelda and Peach, then I can see having to go through multiple playthroughs, one time getting Zelda, one time getting Peach. But not them, since I'm pretty sure they're starters. Also, I'd guess you still unlock a couple characters through Event mode, and Jiggs is still unlocked from your first time through Classic. And there will be a character like Mr. G&W, who you unlock only once you've unlocked everyone else.
A very mysterious update indeed...