Apparantly it's going to be part of Saints Row 4, not sure of the reasoning behind it though.
|Saints Row: The Third – Enter the Dominatrix Now Part of Something Bigger Than Itself|
|Cumulative Awesomeness of Gameplay Experience Can No Longer Fit into Expansion Pack; Enter The Dominatrix Will Be Incorporated into the Next Great Sequel in the Saints Row Franchise
THQ Inc. and Volition, Inc. today announced development of the standalone expansion Saints Row: The Third – Enter the Dominatrix will now be incorporated into production of the next great sequel in the Saints Row franchise, tentatively titled "The Next Great Sequel in the Saints Row Franchise."
"When I looked at the Enter The Dominatrix expansion in production at Volition, I was blown away by the ideas and desire to expand the fiction of the franchise," said Jason Rubin, THQ's President. "I asked the team what it could achieve given more time, more resources, and a broader scope for the project. We all agreed we wanted to play that game. When it comes to Saints Row, it's clear our fans want bigger, better, and even more over the top, and that's why Enter The Dominatrix will now be incorporated into a vastly expanded, full-fledged sequel, scheduled for calendar 2013."
Added Rubin, "We believe the potential for this sequel is far greater as a full-priced, full-length, high quality, connected experience."