Tekken 5: Dark Resurrection
According to Tekken Zaibatsu, Namco is releasing T5: DR, an upgrade to the already badass Tekken 5 that will bring a few more characters from previous Tekken games, plus a couple of newcomers.
Characters that are (seemingly) confirmed are Armor King, who was believed dead in Tekken 4 by Marduk's own hands. Another character who is not exactyly confirmed, but a rumor of sorts seems to be Kunimitsu, Yoshimitsu'straitorous comrade in thievery.
Although Prototype Jack seems to be a big no at the moment. Same for Alex.
Ogre? I wish, it would be a nice addition as well as Devil Kazuya and Angel.
Another update will be the total remodeling of characters in terms of looks and facial expressions, Namco will rework the entire thing from scratch so it seems.
Although it is not certain if this will change gameplay, or it will again, edit fighting styles of every character like it did in T5.
Newcomers are Samboan Wrestler who seems to be in the lookout for Kazuya (rumor), and a 16 year old girl who seems the equivalent of Street Fighter Alpha 3's Karin.
This is my own assumption, but it seem MAYBE you will also be playing as the game's boss, Jinpachi Mishima.
More as it develops, it is aid that the game might be in arceds in Japan in Winter of 2005, again, it is not cetain that this is accurate, so read the link's news to find more.