Warren - played by Jamie Lomas - was last seen on screen in May 2009, when he appeared to be killed by a falling ceiling mirror during a blazing fire which was started by Clare Devine (Gemma Bissix) at The Loft.
However, in a surprise new plotline due to air in the coming weeks, viewers will see that Warren actually managed to make it out of the burning building alive before fleeing the village, leaving his club business behind.
With The Loft now owned by Cheryl Brady (Bronagh Waugh) and Danny Houston (Darren Day) and rebranded as Chez Chez, there looks to be trouble ahead for the pair as Warren returns to Hollyoaks in a bid to reclaim what he feels is rightfully his.
Speaking of the new storyline, Hollyoaks' series producer Paul Marquess commented: "We were hopeful that Jamie's return would be the best-kept secret in soap history, but when Jamie arrived on set it proved impossible. When Warren Fox died in the Loft fire, we all thought that was the end of the dangerous gangster that terrorised the residents of Hollyoaks village.
"But when our writers made the shocking suggestion to bring back Warren in a juicy plot, it was just too irresistible to ignore as they not only made it feasible that Warren could have escaped the fire and fled the village, they created an explosive and very clever plot with lots of twists and turns that is guaranteed to have the audience hooked."
Marquess added: "When the idea was pitched to Jamie, he knew it was too good an opportunity to miss. Warren Fox was one of the soap's most memorable villains and we're very excited about his return."
Exact details of when Warren will reappear on screen are currently being kept under wraps, but it is thought that his comeback episode will air within the next few weeks.