Derek's villainous behaviour has caused a stir in Walford over the past few months, with some local residents feeling intimidated by his presence and others regarding him as an enemy.
However, Foreman told Inside Soap: "In the future, we're going to see a different side to Derek that will take viewers by surprise.
"I've had some great days in the studio lately, where I've been getting involved with characters that I never thought he'd be put together with.
"Derek is a passionate man who can have a lot of consideration for other people, believe it or not!"
The actor also responded to recent fan speculation that Lauren (Jacqueline Jossa) could really be Derek's daughter rather than Max's.
Foreman said: "I've heard that theory myself, and think it's rather interesting. I'm dying to know why Derek and Tanya don't get on. The scripts are always written with them showing so much animosity towards each other, and I'm champing at the bit to find out where that comes from.
"I've got my own ideas about it, but maybe that's it with Lauren - who knows?"
Foreman took over the role of Derek late last year.
> EastEnders to reveal Max, Derek Branning secret
> EastEnders' Derek to go in new direction, says Jamie Foreman
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