Dr. B. Everyone else keeps coming back from the dead, why not him?
Least most anticipated is the final boss. No clue who it is, but from my experiences with the boss progression throughout Tekken's years, it'll either be the Mokujin golem from the Tekken Hybrid Movie or a giant penis. Either can be equally expected.
Why do people insist you google for answers on "Support or Q&A" boards. If everyone just said that, where would google find the answers?