Just let the crowd say "AYE!" or "OH!" for each hit in a big juggle... That easily builds hype, and there's tons of dope combos to "AYE" to (Andy dash elbow to Kuuhaden cancel combos are most definitely AYE-able)...
A random "PREDICTABO" wouldn't hurt either...
But yeah, showing professionalism during any KOF XIII event, whether spectator, commentator, or any form of participant, is definitely important. While people are interested in the game, we don't want any MvC2-esque drama horror stories plaguing the scene.
Getting SNK's (and Atlus') involvment in and with the community definitely will throw fuel to the fire, and will allow others to see how dedicated we all are on both ends of the spectrum. This will definitely make the scene grow bigger, while showing those EVO execs that KOF is worth the slot for a main event. I wouldn't be surprised if many competitors from all over the world show up to this. I mean its actually the biggest tournament in the world now, and what better reason to have the biggest series in the world to tie that with, and that's not speaking from a fanboy's perspective either.
Our very own involvement with the scene/potential scene(s)/people around us will be a big plus. Despite some beliefs, I feel that there's at least 1 strong player (or someone with vast knowledge of the game) in most parts of the US, and this site (or any site for that matter) doesn't truly show that yet. We gotta be those "KOF-evangelists" spreading the dopeness of KOF, and getting cats ready for the arrival of KOFXIII. It's up to SNK to come through with what they say they're gonna deliever though; but, even in all of that, we shouldn't be a "closed off" community. I'm not saying we are at all, because we're not, however, I'm pretty sure there's someone in the area you live in that has heard of, or has played KOF either awhile ago, or a long time ago, and they don't play it now (and haven't heard of this site either).
I know this is the EVO 2k12+ thread, but I think there's more to it than having a good EVO presentation. I mean imagine if the KOF console version was still ver 1.1, and it was a main event at EVO, there would still be those stigmas of K' being strong, Raiden's dropkick, everyone tier whoring, and that Takuma glitch being talked about heavily amongst the viewers both online and offline. Even with the good presentation, we'd really have to work harder at giving people a reason to play the game still, and "convince" them that its fun. It's easier for SF4 players to do that even though many agree that AE is unbalanced in comparison to SSF4- it's Street Fighter; that's practically all that needs to be said. We have to work harder than that, especially considering the fact that many players were left with a sour taste in their mouth because of XII (I kinda liked it, despite its sub-par netcode, and barebones composition-- it was unique imo).
Of course XIII's gonna be as balanced as SNK can make it though. We just have to look beyond building hype for EVO. Not to sound contradicting, but I do agree that there needs to be hype for EVO since that's the biggest way to display the game, cmomunity, and anything else to the world, but I feel that we have to "start swimming to get to the delta before we start worrying about the ocean" first.