I like the make-out music they've got going when they introduce the GCN adapter.
Even though I don't know who any of those people are that are playing, it's clear this is a major Good Thing from Nintendo to acknowledge the following and help address even the little issues (wireless lag) that this section has. (I call it a little issue because I'm not a very good smash player, so it's a Moot Moot Meadows point for me). And of course, this gives hope to the GCN VC games.
So a question for you Sumo - how impressive is the lineup of players?
Yeah, I found the music hilarious. As in, "Is this actually happening?!" Nintendo clearly knew who they were targeting with that announcement: those who are a little obsessed and believe the GameCube controller is the best ever made.
I was going to include a breakdown of the player list in the OP, but I suppose I didn't. Eh, I guess I'll do it now...
Is the player lineup impressive? Quite so, actually. It's made up mostly of popular Melee players, which is great, but also includes a couple notable Brawl players like Zero and The Rapture. The most important thing to note is that every player is a legitimate pro player. Or, at least, was at some point...
Ken and Korean DJ (er... LiquidDJ) were pretty much shoe-ins, as they're some of the more publicly recognized players who still play today. They each have their own episode in the Smash Documentary, and it was smart for Nintendo to capitalize on that. Ken is still considered the King of Smash because of his reign back in the golden era of Melee, and has won more total winnings than any other player. KDJ is also a great player...
We also have HugS, who is an old-timey Samus Melee player who's also featured in the doc quite extensively. And Hungrybox, while he doesn't have his own episode in the documentary, is one of the current Elite 5 in Melee and is featured prominently throughout the series (and will get his own segment in the upcoming 10th episode).
Probably for PR reasons, we have a couple females. Milktea has technically been retired from Melee for years, but since she was featured in the documentary, her inclusion makes sense. Peachyhime is a Brawl/Melee player who (unsurprisingly) mains Peach. I've heard of Lilo, but I didn't realize she was popular. Maybe she is "for a girl."
DJ Nintendo is a very skilled Melee/Brawl Ice Climbers player who's now hitting his prime.
PPMD, aka "Dr. Pee Pee", is one of the best Melee players that ever was. Like Hungrybox, he's one of the Elite 5.
My favorite member of the lineup is aMSa, who hails from Japan. He's recently made a splash in Melee with his Yoshi, a character who most consider weak. He placed something like 11th or 13th at Apex, a 700-player tournament, this year... With Yoshi. So I have to love him. Also, he doesn't speak fluent English.
There's a couple Californian locals in there, Toph and PewPewU, but both are well-known nationally. Toph, interestingly enough, is probably better known as a commentator than a player.
And that brings me to the commentators, who Nintendo calls "Announcers". Same difference, I guess. Prog and D1 are the most brilliant, perfect choices. There are no other commentators more pronounced, eloquent, professional and well-known in the Smash community than these two. Prog is featured heavily in the documentary, too.
Scar, on the other hand, is very surprising. He's very popular, sure, but only in the Melee circuit. He's been known to say some pretty, erm, negative things about Brawl. He's also known to be rather rambuncious and hyper and loud... On the flipside, he can be professional when he needs to be, so he'll probably be reigned in for this...
And there's my "brief" analysis. I excluded a few Brawl players, MacD and Crismas, because I don't really know much about them. I'll add them all to the OP in list form later.