It looks like Rig has finally been announced, and with it is a new trailer of him fighting Christie and Bass on an oil rig.
Rig is a Tae Kwon Do user from Canada who apparently is working on an oil rig with Bass Armstrong of all people. Bass is also repairing his bike while in the middle of the ocean doing his job in the mean time. You even get to see a return of his DOA3.1/3.2 4F+P launching throw.
Apparently there's also some history with Rig and Christie. I'm sure we'll find out once the game hits store shelves on September 25th so be sure to pick up your copy at launch day.
Update: Koei-Tecmo has provided the following bio for Rig:
The stills for Bass and Rig are displayed below:
Screens released related to the trailer: