But how am i gonna with zafina otherwise
Zafina is a recent entry in the series, so she is going to come back. Remember, this is just an early build of the game, so the full roster of characters isn't out yet.
Personally, I would be glad if the roster for Tekken 7 got a reduction. A lot of the characters who came back in Tekken 5 really didn't have a place in the story anymore. Tekken 3 was the generational shift game, much in the same vein as Street Fighter III and Soulcalibur V. Tag 2 was mainly full of semi-clones. I want this game to have more of a Tekken 4 feel, but honestly, I know that's not going to happen. Tekken 4 is my favorite in the series, because the atmosphere of that game was so unique: more realistic story, no supernatural boss, awesome music, darker tone. *sighs* Ah well, still excited to see where Tekken 7 goes.