We will see.doesn't she play Street Fighter? my point is people know her, she (as I understood from the interview) organize some sessions - it may help community. Her opinion won't influence on my decision regarding Injustice but I think it's nice that people from another communities are interested in this game.
To be honest I don't really know if people from other communities are interested into the game.
That interview came from Finish-Him, which ... judging by the name ... should be a french MK kommunity and it should be obvious, that they're interested in Injustice. And they got Kayane to register on their board.
Will she stick to it and promote the game? Who knows. I'm not sure if it really matters, because it will stay in France I guess.
The more interesting thing is to see Capcom players, who most of us know, like Justin Wong, Chris G, Fanatiq and FilipinoChamp being interested in the game. If they decide to pick it up and stay to it for a while it certainly could attract more people from their community (UMVC3, SF4).