My thoughts is that they're trying to advertise the game as if we don't know about the game... It would be kinda cool if they had actual good matches or a tutorial advertising it instead of stating the obvious...
Hey cmon, I shouldn't be the only one who learned that RYO SAKAZAKI FROM ART OF FIGHTING WAS THERE!
I never get why everybody treats it like a super spoiler, some reviews do it, hell, if you bought the snes version you will know the secret already
But lol, they were doing a trivia asking which cameos appeared on ryo stage, I answered expecting some kind of prize only to get a ''good one!'' from SNKP