An expansion originally intended for Saints Row: The Third has become a part of Saints Row 4, publisher THQ has revealed.

The full sequel is set for release in “calendar 2013”, THQ’s president Jason Rubin has announced.

"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," Rubin said.

"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."

The proposed changes have meant that THQ will see profits from the game in 2014’s financial year, meaning this will be a post-April 2013 launch.

Saints Row 4 is rumored to be in development for Xbox 360, PS3 and PC, with a range of new characters and an “even broader appeal”

THQ’s exec Danny Bilson has said the company are “a year away from talking about it, probably”.