yme : That means one: BRYAN IS DEADAin't he dead already? :p
My supposing is, that if Namco would take out Yoshi - even from one Tekken - the number of players will decrease. He's a trademark; the game would feel incomplete without him. I really can imagine someone playing Tekken 6, and after a while he/she would exclaim, "Okay, now where the h*ll is Yoshimitsu?!", even though he/she wouldn't have favorited Yoshi in the first place.
And even if Bryan's ending would come to pass... didn't someone say that before the "final blow", the screen goes black and *then* we hear a gunfire? When screen goes black, everything is possible. (Okay, a bit wishful thinking, but still...)