C'mooooonnnnn you gotta be kidding, what if they made it a launch title, and then next year they made some brand new games as good as Punch-Out!!? Heck, if it were a launch title, it would automatically kick out EVERYTHING new to the Wii U... unless DLC happened
Granted, there was almost nothing new and amazing on the Wii that was first-party Nintendo besides Punch-Out!!, so there's not a whole lot to compare the situation to... but man, it would've been well worth another year's wait for more Punch-Out!! presence in Brawl.
I guess it would be entirely on-topic to talk about what I want from Brawl that would be inspired by 2009's Punch-Out!!. I bet I've rambled on about this some time in the past but OH WELL I DO IT AGAIN
· Playable Little Mac is a given, of course. He doesn't have many of his own unique moves besides the Star Punch, but I don't suppose it would be too strange to have him borrow some of his opponents' punches like a quicker version of Bear Hugger's Bear Hug, a more streamlined version of Super Macho Man's clothesline, or a less fab-u-lous version of Disco Kid's counter.
· An item, the boxing glove on a rope used by Aran Ryan. I guess characters would swing it over their heads before tossing it, or maybe use it as a tether recovery, or whatever
· A stage set in a boxing ring. To call back to Super Punch-Out!!, Mario and Luigi could appear in the stands when not in play. Donkey Kong would have to appear back there as well. If Little Mac is in play, Doc would stand close to the ring, eating obscene amounts of chocolate, and Mac could do a Smash Taunt like Snake can in Shadow Moses Island and the Star Fox characters can in their stages. When he does, Doc would quip about one of Mac's opponents, like
On Mario: Hey Mac... bet you never thought you'd see Mario in the ring with you... again! Hahahaha!
On Bowser: Listen here Mac Baby, if Bowser kidnaps my chocolate bars, I'm countin' on you to get 'em back for me, okay?
On Wario: Hoo-wee, Mac! That's one nice bike! Think that when Wario ain't lookin', you can grab it for me?
On Zelda: It ain't nice to hit a girl, son. But maybe Princess Zelda will do somethin' about that for ya, ahahahaha!
On Pikachu: Hey Mac Baby, why you punchin' Pikachu? You don't know what it's like bein' picked on by somebody twice yo' size! Oh wait a second, maybe ya do! Hahahahahaha!
Etc.
And I guess the stage could be like Spear Pillar and have variations, the Minor, Major and World Circuit rings.