The actor, who has now been with the BBC soap for a year, predicted that fans will learn more about Ray's past in 2013.
Venn told Inside Soap: "I've been told by the bosses that there's something interesting around the corner for Ray, and to watch this space for a big surprise coming his way.
"We know that Ray's a pretty likeable fella, but there is a darker side to him as well. You have to remember that this guy used to be in the Army, so maybe we'll explore the consequences of that experience.
"There's lots coming up - I just can't divulge it all!"
In the meantime, Ray kicks off the New Year with an unexpected decision as he ends his relationship with Kim Fox (Tameka Empson) in the aftermath of a shock kiss with her sister Denise (Diane Parish).
Venn explained: "Ray reaches a point where he needs to come up for a breath of air, as there's only so much of Kim's heightened personality he can bear.
"Did Ray go for the wrong sister? Who knows? He probably has more in common with Denise than he ever had with Kim."
Photo gallery - A year on 'EastEnders' in pictures: