In a arcade presentation at Mexico, Neo-Geo Battle Coliseum and Samurai Shodown Tenkaichi Kenkyakuden were playable. You can see a video (in low and “high” options) here:
Dont bother if youre only interested in the SS footage, because its jumpy and blurry as fuck (plus, people are always walking in front of the screen). Only download it if youre interested in NGBC footage (better - the camera is closer and mostly still). You can also see them fight them defeat Mizuchi (the fake Orochi), so it shows one of the (three?) “bad” endings.
In the video you can see a little bit of the SS Tenkaichi opening, and Cham-Cham is in there (which means the only characters not confirmed yet are Sieger, Earthquake, in-game Kuroko and playable Poppy).
P.S: I wouldnt really recommend download the 80 meg version, because the people playing are not good at all.
P.S.2: First person to post this at MMCafe is a jack-ass.
Someone at neo-geo.com mentioned seeing Earthquake and Sieger in the video (he also mentions Gen-an, Nicotine and Wan-Fu, but we all knew those were in already). I went through it frame by frame, and i can see Earthquake clearly (at the top, behind Cham-Cham). But the one he says is Sieger… i cant even make out what the fuck that is.
Someone from Mexico reports Akari in NGBC has a DM where Takuma, Todoh, Earthquake and Kusaregedo appear.