PROJECT: OVERDRIVE and the mysterious person

Who is that in Yi's background? He appears very well in 1:28. https://www.youtube.com/watch?feature=player_embedded&v=jB1XvMyEBNA#t=87 Could this be or ? These are the only champs with two weapons but Olaf isn't that kind of champ and doesn't have his weapon his back nor are they swords... Shen is also a good choice as he wears them on his back and such but is he really the villain?

Or is it a new champ coming this November? Or December? Please don't down vote as I want to know what everyone thinks (and hopefully a tease from Rito).